Jesús Rodríguez Romero

• Doctor of Education
• Professor-Investigador at Centro de Investigaciones Biológicas del Noroeste S.C.

Para estudiar las asociaciones de adultos y larvas de peces en El Bajo Espíritu Santo (EBES), se tomaron muestras de plancton y censos visuales desde diciembre de 1995 a diciembre de 1998. Se realizaron experimentos de marcado de atún aleta amarilla de abril a septiembre de 1998. Los registros de marcado se llevaron hasta febrero del 2000. Al mismo...

Fish composition, abundance, and diversity were recorded by visual censuses at five sites near the Espiritu Santo Island and one near the Espiritu Santo Seamount, and compared to hydrographic parameters (salinity, oxygen, water temperature). Surveys conducted between November 1995 and October 1996 recorded 51,099 fishes, belonging to 41 families, 8...

The analysis of the stomach contents of 500 dolphinfish Coryphaena hippurus is presented. The fish were caught from the shoreline to 25 miles off Cabo San Lucas, Baja California Sur, Mexico. Fifty-one prey were identified from the food items of the dolphinfish, which pertain to three categories: fishes, cephalopods and crustaceans and, according to...

The effect of dietary protein (31, 41, 45, and 55%) was evaluated in quadruplicate in the yellow snapper (Lutjanus argentiventris). Specimens were kept in sixteen 200 L plastic tanks for 95 days and the values of growth rate, feeding efficiency and proximate composition of yellow snapper (18 g) were examined. Every 15 days were carried out individu...

The composition of demersal fish along the western coast of the State of Baja California Sur, Mexico, including the limit of the northern distribution of the ichthyofauna of the eastern tropical Pacific, is presented. The survey was carried out on four oceanographic cruises between autumn 2004 and March 2006. Of 220 species in 132 genera and 73 fam...

Coastal lagoons are environmentally and naturally dynamic areas crucial for fish reproduction and nursery. Thus, this research aims to evaluate the importance of the species performing their biological processes and development in this ecosystem. For this purpose, a subtropical coastal lagoon in the Gulf of California was taken as a case study, whe...

The blackfin snook, Centropomus medius, is a valuable fish in American and Mexican markets, mainly from catches. Nonetheless, information and studies about the biology of this species still need to be made available; thus, its aquaculture should be developed. This study aimed to describe the seasonal changes of proximate composition during a reprod...

This study provides information on feeding habits of the lizardfish Synodus scituliceps, one of the most abundant and frequent species in shrimp by-catch in the demersal area in the eastern coast of the Gulf of California, Mexico. Stomach content analyses were performed on 114 organisms caught from August 2004 to March 2005, and Levin's index was a...

Four new malformations observed in blue shark embryos in the western coast of Baja California Sur, Mexico are reported in this study. The embryos of blue shark samples were obtained on board the industrial fishing boat ‘Damasta’; the organisms were frozen and transferred to CIBNOR Fish Ecology Laboratory where the corresponding measurements were ta...

Se presentan los resultados más sobresalientes de las diversas investigaciones que el Centro de Investigaciones Biológicas del Noroeste, S. C. ha llevado a cabo en torno al tema de los efectos de las redes de arrastre en los fondos marinos del Golfo de California. El enfoque con que ha sido abordado el problema es multidisciplinario e interinstituc...

Coastal lagoons are characterized by high diversity, richness, and abundance of fishes, which can be modified by high variability of environmental conditions. The present study aims to describe the structure of the fish community and related its seasonal variability with temperature and salinity in a coastal lagoon. During 6 seasonal sampling campa...

Background Malformations of the Round stingray Urobatis hallerii, Cooper 1863 captured off the southwestern coast of Baja California Sur, México are reported in this study. Methods The ray was an adult male captured by artisanal fishery in the area of Estero Banderitas. Size measurements of total length and disk width were taken; the organism could...

The southwestern Gulf of California has high-value commercial fisheries; however, there are few studies of the taxonomic diversity of fish in this area. Surveys of taxonomic diversity of the fish assemblage at 8 localities near the shore of Bahía de La Paz were undertaken from March 2002 to April 2003. Seasonal changes in diversity of rocky reef fi...

We presented the species composition and biogeography at the Las Guasimas Lagoon, located in the central portion of the Gulf of California. We perform seven sampling and the seasonal collections were made with three gear: cast nets, seine and trawl line. We recorded 95 species represented by 16 orders, 38 families and 67 genera. The families in num...

We presented the species composition and biogeography at the Las Guásimas Lagoon, located in the central portion of the Gulf of California. We perform seven sampling and the seasonal collections were made with three gear: cast nets, seine and trawl line. We recorded 95 species represented by 16 orders, 38 families and 67 genera. The families in num...

The mesozooplankton community of Las Guásimas, a coastal lagoon at the coast of Sonora, Mexico, was investigated to determine, for the first time, their composition, structure and diversity monthly, given the high ecological and fisheries importance of this ecosystem and its designation as a RAMSAR site. Sampling was conducted at two representative...

En el presente trabajo se presenta la parasitosis de un ejemplar juvenil de Masturus lanceolatus, con una longitud total de 130 cm y un peso de 120 kg, fue observado y capturado vivo presentando una conducta de ahogamiento o asfixia ya que daba vueltas y giraba en posición vertical abriendo y cerrando la boca.Al hacer la necropsia y disección del e...

The Pacific red snapper, Lutjanus peru, is a commercially important species throughout its distribution range, making it a good alternative for aquaculture; however, there is few information regarding environmental conditions and their influence on early development of this species. Temperature is one of the main factors affecting embryo and larval...

San Ignacio Lagoon is located within the Vizcaíno Biosphere Reserve. There has been limited study of its ichthyofauna to date; the objective of this chapter is to describe the composition and distribution, as well as the temporal and spatial abundance of the ichthyofauna associated with soft bottoms in this coastal lagoon. A total of 44 trawls were...

The San Ignacio Lagoon is part of the Vizcaino Biosphere Reserve, a location that has been declared a critical area for the conservation of marine mammals and fish that use it for breeding, feeding and refuge. The present paper has as its main focus to determine the impact of a large-scale oceanographic phenomenon (El Niño/La Niña) on the zoogeogra...

RESUMEN La Bahía de La Paz, es una de las bahías más grandes de la zona central del Golfo de California, esta zona se caracteriza por los altos niveles de captura comercial de peces que existen en la zona; sin embargo el número de investigaciones realizadas para conocer su diversidad taxonómica es bajo. Se determinó la variación en la diversidad ta...

The Brown smooth-hound Mustelus henlei is part of an important commercial fishery on the western coast of Baja California Sur (BCS), Mexico. However, very few studies have been performed on the feeding and reproduction biology of these sharks in Mexico. Our study is the first work focusing on this species on the western shelf (14 m to 250 m in dept...

The Brown smooth-hound Mustelus henlei is part of an important commercial fishery on the western coast of Baja California Sur (BCS), Mexico. However, very few studies have been performed on the feeding and reproduction biology of these sharks in Mexico. Our study is the first work focusing on this species on the western shelf (14 m to 250 m in dept...

The association between the scyphomedusae Stomolophus meleagris (Agassiz 1862) and a cirripede indentified as Conchoderma cf virgatum (Spengler, 1790) in the Gulf of California was recorded for the first time on April 2010, during the fishing season of edible jellyfish in Guaymas, Mexico. Despite its wide distribution, records on this barnacle are...

The association between the scyphomedusae Stomolophus me-leagris (Agassiz 1862) and a cirripede indentified as Conchoderma cf virgatum (Spengler, 1790) in the Gulf of California was recorded forthe first time on April 2010, during the fishing season of edible jellyfish in Guaymas, Mexico. Despite its wide distribution, records on this barnacle are...

Se presentan los resultados más sobresalientes de las diversas investigaciones que el Centro de Investigaciones Biológicas del Noroeste, S. C. ha llevado a cabo en torno al tema de los efectos de las redes de arrastre en los fondos marinos del Golfo de California.El enfoque con que ha sido abordado el problema es multidisciplinario e interinstituci...

Although San José Island is considered one of the most important islands in the lower Gulf of California due to its commercial fishing activities, few studies have evaluated their fish taxonomic diversity. The aim of this study was to determine the variation in the taxonomic diversity of the conspicuous fish community in eight locations around San...

The effect of dietary protein (31, 41, 45, and 55%) was evaluated in quadruplicate in the yellow snapper (Lutjanus argentiventris). Specimens were kept in sixteen 200 L plastic tanks for 95 days and the values of growth rate, feeding efficiency and proximate composition of yellow snapper (18 g) were examined. Every 15 days were carried out individu...

Background. The San Jose and San Francisquito Islands and El Pardito Islet are important for recreational tourism, sport fishing, and commercial fishing. They are part of an “Area Natural Protegida” and “Area Prioritaria Marina”; however, studies on the composition and diversity of their marine floral and faunal communities are limited. To provide...

The Gulf of California is one of the most fish diverse areas of the Tropical Eastern Pacific Ocean. In spite of its economic value, few works have considered fish community studies for optimum management. With the aim to determine the seasonal and spatial variation of fish communities in eight locations around the San José Island, some ecological r...

Para determinar la variación estacional y espacial de la comunidad de peces en ocho localidades alrededor de la Isla San José en el Golfo de California se realizo un estudio ecológico de marzo 2001 a febrero 2002. Además, se utilizaron censos visuales en 48 transectos de 100x5m (500m²). También, se detectaron dos temporadas climáticas: una fría y o...

The Gulf of California has a high variety of ecosystems that allow different services and the fishery resources play a prominent role in its ecology, evolution and economics. Fish coastal species have been previously reported for most coastal areas, especially those species that are subject to fishing, however, little is known on the species from d...

The Gulf of California has a high variety of ecosystems that allow different services and the fishery resources play a prominent role in its ecology, evolution and economics. Fish coastal species have been previously reported for most coastal areas, especially those species that are subject to fishing, however, little is known on the species from d...

Se presenta la primera información sobre la composición íctica de la zona de manglar de Rancho Bueno, B.C.S., a partir de muestreos realizados con red de arrastre “chango”, se capturaron 3,082 organismos juveniles, correspondientes a 62 especies, 48 géneros y 30 familias. Las especies más frecuentes y abundantes fueron Etropus crossotus, Eucinostom...

The daily food intake rates of the striped marlin, Kajikia audax (Perciformes: Istiophoridae), were estimated using qualitative and quantitative analyses of their trophic spectrum. We analyzed the stomach contents of 505 striped marlin caught by the sport fishing fleet off Cabo San Lucas, Baja California Sur, Mexico, sampled from October 1987 throu...

The daily food intake rates of the striped marlin, Kajikia audax (Perciformes: Istiophoridae), were estimated using qualitative and quantitative analyses of their trophic spectrum. We analyzed the stomach contents of 505 striped marlin caught by the sport fishing fleet off Cabo San Lucas, Baja California Sur, Mexico, sampled from October 1987 throu...

The fish assemblage in a coastal lagoon with mangroves known as "Rancho Bueno" was determined and associated with environmental parameters. We used an experimental otter trawl net to catch the fish, and 62 fish species were identified from 48 genera and 30 families. The most abundant species were: Etropus crossotus, Eucinostomus gracilis, Paralabra...

The fish assemblage in a coastal lagoon with mangroves known as "Rancho Bueno" was determined and associated with environmental parameters. We used an experimental otter trawl net to catch the fish, and 62 fish species were identified from 48 genera and 30 families. The most abundant species were: Etropus crossotus, Eucinostomus gracilis, Paralabra...

Shrimp trawling fishery in the Gulf of California captures a wide variety of non-target species of fish, crustaceans, and mollusks that are relatively unknown. The Pacific flagfin mojarra Eucinostomus currani is a frequently found species in these catches, nevertheless, nothing is currently known about its population dynamics. To contribute to the...

Composición taxonómica de peces integrantes de la fauna de acompañamiento de la pesca industrial de camarón del Golfo de California, México. La pesquería de camarón es la más importante en el Golfo de California y también la más problemática con respecto a las capturas incidentales en México. Dentro de la fauna de acompañamiento del camarón (FAC),...

Bycatch fish species from shrimp industrial fishery in the Gulf of California, Mexico. The shrimp fishery in the Gulf of California is one the most important activities of revenue and employment for communities. Nevertheless, this fishery has also created a large bycatch problem, principally fish. To asses this issue, a group of observers were plac...

Se revisa el efecto de la variabilidad ambiental en la dinamica poblacional del camaron cafe F. Californiensis. Se explorar diversas escalas esoacio temporales y se muestra que el camaron responde a muktiplesca escalas ambientales.

A record length of 475 mm for yellowfin mojarra (Gerres cinereus) was recorded, a 65 mm increase over the previous record for all the members of the Gerreidae family, worldwide.

Este trabajo es la primera contribución al conocimiento de la dieta del Pejegallo Nematistius pectoralis, capturado en Bahía Almejas, Baja California Sur, México. Se describe cualitativa y cuantitativamente el espectro trófico de 59 ejemplares de N. pectoralis, usando los métodos tradicionales de frecuencia de aparición, numérico y peso, así como e...

Se recolectaron 143 ejemplares de tiburón narizón Apristurus nasutus (de Buen, 1959), durante un crucero de prospección en junio de 2007. Las muestras provinieron de tres lances realizados con una red de arrastre entre los 250 y los 460 m de profundidad, en la parte media y alta del Golfo de California. El hallazgo representa el primer registro de...

A total of 143 organism of Apristurus nasutus (de Buen, 1959), were caught in a research survey at June 2007. The samples were obtained by means of a trawl net at 250-460 m depth, in the middle and north part of Gulf of California. This finding represents the first record of Apristurus nasutus in Mexican waters and therefore gives it a wider range...

An analysis of the demersal fish community of the eastern continental slope of the Gulf of California, Mixico, was performed. Samples were obtained with a trawl net at 90-540m of depth by three separate research surveys. Temperature-salinity diagrams showed two main water masses, one represented by the Gulf of California water mass, down to a depth...

The food habits of 81 organisms of the raucous grunt Haemulopsis leuciscus were analysed. The organisms were captured in Bahía Almejas, Baja California Sur, Mexico, during five bimonthly samplings (March–November 1998). The index of relative importance indicated that H. leuciscus consumed a total of eight prey-items, and the dominant prey were the...

Summary The length–weight relationship parameters were recorded for 24 families, 34 genera and 46 species of 10 963 specimens sampled off the western coast of Baja California Sur, Mexico, many for the first time. New maximum length records were obtained for seven of these species. The b values ranged from 2.62 for Sebastes rubrivinctus to 3.80 for...

Taxonomic composition and zoogeographic relations of demersal in the western coast of Baja California Sur, Mexico. The composition of demersal fish along the western coast of the State of Baja California Sur, México, including the limit of the northern distribution of the ichthyofauna of the eastern tropical Pacific, is presented. The survey was ca...

By determining the specific composition, spatial distribution and population dynamics of flatfish species captured in shrimp trawls' bycatch in the Gulf of California, this study aims to contribute to the knowledge of bycatch fish population which has thus far been of little interest. Samplings were taken from shrimp trawls' in two fishing seasons...

First reported records of the leopard cusk-eel Lepophidium pardale (Ophidioidei: Ophidiidae) off the west coast of Baja California Sur, México. By J. Rodrıguez-Romero1, D. S. Palacios-Salgado1, E. E. De la Vega-Meza1 and B. Aguilar Palomino2 1Centro de Investigaciones Biolo´gicas del Noroeste (CIBNOR), La Paz, Baja California Sur, Me´xico; 2 San...

Se analizaron 304 estomagos del pargo amarillo Lutjanus argentiventris recolectados bimestralmente de abril 2003 a abril 2004, de los cuales 44% presento alimento (44%). Se identificaron 54 tipos de presa. De acuerdo con el indice de importancia relativa (IIR), los huevos de peces (62%) y los peces Harengula thrissina (23%), Porichthys margaritatus...

Se detectó la asociación de juveniles del jurelillo negro Hemicaranx zelotes (Gilbert 1898) con medusas de la especie Stomolophus meleagris (Agassiz 1860) en Bahía de Kino, Golfo de California, México. Los peces fueron observados acompañando a la medusa entre la subumbrela y los brazos orales, manifestándose una simbiosis, comportamiento usualmente...

Juvenile Blacking Jack Hemicaranx zelotes (Gilbert 1898) associated with cannonball jellies Stomolophus meleagris (Agassiz 1860) in Kino Bay, Gulf of California, Mexico was observed. The fish accompany the jellies, swim between the umbrella and the oral arms, showing a symbiotic behavior that the fish use for protection from predators. This is the...

A total of 304 yellow snapper Lutjanus argentiventris stomachs were sampled bimonthly from April 2003 to April 2004, of which 44% contained food. We identified 54 prey species. From the index of relative importance (IRI), fish eggs (62%), Harengula thrissina (23%), Porichthys margaritatus (3.3%), and Abudefduf troschelii (2.3%) were the prey of gre...

By determining the specific composition, spatial distribution and population dynamics of flatfish species captured in shrimp trawls’ bycatch in the Gulf of California, this study aims to contribute to the knowledge of bycatch fish population which has thus far been of little interest. Samplings were taken from shrimp trawls’ in two fishing seasons...

Two specimens of the spottail moray Gymnothorax equatorialis were identified for the first time off the west coast of the State of Baja California Sur. This discovery also constitutes the northernmost record of this species on the Pacific Coast. The possible causes of its occurrence in the north-eastern Pacific are discussed and information about t...

Not abstract. Information: The family Cottidae is represented by about 275 species in 70 genera (Nelson 2006), with greatest diversity along the North Pacific coastline from Japan to southern California. The genus Icelinus contains 11 species (Bolin 1936, Yabe et al. 1980, Yabe et al. 2001, Rosenblatt and Smith 2004), all occuring in the North Paci...

Induced spawning of two wild females of the leopard grouper, Mycteroperca rosacea, was obtained using Human Chorionic Gonadotropin (HCG) supplied in two dosages: a first injection of 1000 IU/kg and a second of 500 IU/kg, 24 h apart. Of the four treated females, two had a positive spawning response, releasing approximately 40,000 eggs/fish. These we...

Fish composition, abundance, and diversity were recorded by visual censuses at five sites near the Espiritu Santo Island and one near the Espiritu Santo Seamount, and compared to hydrographic parameters (salinity, oxygen, water temperature). Surveys conducted between November 1995 and October 1996 recorded 51,099 fishes, belonging to 41 families, 8...

Ecological surveys from several coastal environments in Bahía de La Paz were analysed to determine the seasonal changes in the fish assemblages in the largest bay of the Gulf of California. We identified 58 species from 37 genera and 23 families in seasonal gill net samples were taken over 1 yr. Using the relative abundance index (%N), the most imp...

Analysis of the stomach contents of 204 blue marlin (Makaira mazara) caught by the sport-fishing fleet of Cabo San Lucas in the southern Gulf of California is presented. The specimens sampled were caught during the summer and fall of 1987, 1988, and 1989 when the sea is warm (28–30°C). Blue marlin were found to feed on 35 prey species, 3 of which r...

The effect of stocking density on the growth and survival of the yellow snapper Lutjanus argentiventris when confined in 1-m3 cages in a tidal pond for 125 d was investigated. Test densities were 6, 9, and 12 fish/m3 with three replicates each. Preliminary results indicated that density of 6 fish/m3 had a significant difference in growth (P < 0.05)...

The effect of stocking density on the growth and survival of the yellow snapper Lutjanus argentiventris when confined in 1-m³ cages in a tidal pond for 125 d was investigated. Test densities were 6, 9, and 12 fish/m³ with three replicates each. Preliminary results indicated that density of 6 fish/m³ had a significant difference in growth (P < 0.05)...

Fish assemblages from soft bottoms were studied to produce an ecological index of abundance, biomass, species richness, and species dominance in a Mexican coastal lagoon. Sampling was done by trawling between February and September of 1989. In total 1336 fish from 25 families, 44 genera, and 55 species were caught. The majority of species were smal...