Gary Anderson

• PhD
• Professor Emeritus at University of Southern Mississippi

The tanaidacean metapseudid subfamily Synapseudinae Guţu is reviewed, partially revised and the type species, Synapseudes minutus Miller, redescribed. As rediagnosed and defined here, the Synapseudinae is restricted to the genera Synapseudes Miller, Vicinisyndes Guţu, and Creefs Stępień & Błażewicz-Paszkowycz. The genera Curtipleon Băcescu and Cryp...

It has been over three decades since Jürgen Sieg submitted the manuscript that was ultimately published in 1983 as Crustaceorum Catalogus- Pars 6- Tanaidacea. His comprehensive treatment of literature published over the course of the previous 175 years remains a primary resource for the order, Tanaidacea. At the time of publication, Sieg recognized...

Background: The question of how many marine species exist is important because it provides a metric for how much we do and do not know about life in the oceans. We have compiled the first register of the marine species of the world and used this baseline to estimate how many more species, partitioned among all major eukaryotic groups, may be disco...

Tanaidaceans are small peracarid crustaceans which occur in all marine habitats, over the full range of depths, and rarely into fresh waters. Yet they have no obligate dispersive phase in their life-cycle. Populations are thus inevitably isolated, and allopatric speciation and high regional diversity are inevitable; cosmopolitan distributions are c...

Seawater-adapted mummichogs (Fundulus heteroclitus) were exposed to total NH4-N concentrations of 1, 2, 5, 10, 25, 50, 100, 150, and 200 mg/L for periods of 2, 4, 8, 12, 18, 24, 36, and 48 h. Afterward, the fish were captured quickly and anesthetized with MS-222 before blood was collected. The concentration of total NH4-N and duration of exposure a...

The crustacean order Tanaidacea was not treated in Gulf of Mexico, Its Origin, Waters, and Marine Life (edited by Galtsoff 1954). At the time of that publication, only a single tanaidacean, Hoplomachus (=Apseudes) propinquus (Richardson, 1903) had been reported from the Gulf of Mexico (GMx) (Richardson 1905). Since then, 72 nominal taxa have been d...

Decapsulation of Artemia spp. cysts in strong hypochlorite solutions reportedly increases the number of nauplii that hatch. Commercial cysts of Artemia franciscano were subjected to four decapsulation methods prior to hatching them in aerated seawater. Samples were removed from the hatch vessels every 5 h from 15 through 45 h, and fully hatched nau...

We evaluated survival, growth and time to maturation of the fairy shrimp, Streptocephalus seali Ryder, in the laboratory at various combinations of temperature and water hardness. Both independent factors affected survival and growth of S. seali . Multiple regression analysis and response surface modelling predict that after 4 days, over 80% surviv...

The scope-for-growth (SFG) of an animal is the portion of assimilated energy used for secondary production after maintenance requirements are met. The SFG of Penaeus setiferus was calculated as the difference between absorption (A), and the sum of the respiration (R) and excretion (U) [SFG = A - (R+U)]. Protocols were developed and SFG determinatio...

Anesthetics are used to reduce stress in fishes during handling and transfer. However, deep anesthesia of seawater-adapted mummichogs (Fundulus heteroclitus) results in a time-related increase in plasma cortisol, indicating a primary (neuroendocrine) stress response. Groups of seven fish were bled within 1 to 12 min of exposure to the anesthetic MS...

ABSTRACT Of 558 Palaemonetes spp. exposed to infective cryptoniscus larvae of Probopyrus pandalicola, 364 became infected (most within 24 h after exposure). Larvae of Probopyrus pandalicola are host specific (permanent infections leading to parasite maturation resulted when Palaemonetes pugio was exposed but only temporary infections or host death...

ABSTRACT We evaluated the interrelationships between egg size, maternal length, and habitat type for the fairy shrimp Streptocephalus seali from a variety of localities. Our analyses demonstrated a correlation between female length and egg size for samples from California, Florida, and Montana, and for pooled data using all samples. However, there...

Swimming responses of Probopyrus pandalicola (Packard) cryptoniscus larvae to water solutions either conditioned or unconditioned by hosts were determined using a simple Y-tube choice apparatus. Results document that larvae swim at random or downstream with respect to water current in unconditioned control solutions. In the presence of either “crud...

Environmental monitoring of open-water disposal sites is too frequently a process of sampling as many ecosystem components as possible in the hope that project-induced impacts will be detected. This approach has two major shortcomings: (1) there usually has been no attempt to predict impacts or set levels at which impacts are considered adverse; an...

This species profile summarizes much of the literature published about the biology of grass shrimp, Palaemonetes spp. Five species (P. pugio, P. vulgaris, intermedius, P. paludosus, and P. kadiakensis) are common in coastal waters of the northern Gulf of Mexico, although the last two are primarily freshwater forms. The brackish-water species are am...

D’avril 1978 à avril 1979 une étude de la crevette d’eau douce Macrobrachium ohione a été effectuée dans la basse rivière Pascagoula (Mississippi, U.S.A.) sur des crevettes adultes et sur des larves capturées dans le plancton. Des spécimens marqués ont servi à étudier le mouvement et la taille approximative de la population. Il a été établi que l’a...

Larvae of Probopyrus pandalicola, P. floridensis, and P. bithynis were raised experimentally in the laboratory. Development times of larvae (epicaridium to cryptoniscus) and intermediate host selection were the same for all parasite species. We used SEM and LM to obtain both morphological and morphometric data on first and final stage larvae from e...

Larven von Probopyrus pandalicola, einer die ästuarine Garnele Palaemonetes pugio parasitierenden Art der Isopodenfamilie Bopyridae, wurden im Labor gezüchtet. Obwohl verschiedene Arten ästuariner Copepoden frei schwimmenden Larven des Parasiten ausgesetzt wurden, hat sich Acartia tonsa als die einzige, regional häufig vorkommende Copepoden-Art erw...

The authors note the occurrence of Macrobrachium carcinus (Linnaeus, 1758) and Macrobrachium olfersii (Wiegmann, 1836) in Mississippi, U.S.A. No specimens of the former species and only one specimen of the latter species have been previously reported in the scientific literature from waters of the northern Gulf of Mexico east of Texas, U.S.A. It is...

1.1. Metabolic rates, temperature acclimation patterns and mortality resistance at high temperature were determined for Mya arenaria collected in summer from four beach levels at Blue Hill Falls, ME.2.2. For a clam of intermediate size, metabolic rate is highest at the high intertidal level and lowest at the low intertidal level; subtidal and mid i...

I quantified the effects of parasitism by the isopod Probopyrus pandalicola on energy flow through the host Palaemonetes pugio by comparing secondary production, metabolism, ingestion, and egestion by unparasitized laboratory shrimp populations to the same parameters for parasitized groups during 10 months. The effects of parasitism on host growth...

Abstract1.Standard metabolic rates for Palaemonetes pugio and P. pugio parasitized by the epicaridean isopod Probopyrus pandalicola were measured using manometric techniques.2.Results in most instances show lower rates of oxygen consumption for infected shrimp than for control shrimp of equal size. This effect is generally most pronounced in the sm...

1.1. Larval isopods of the parasitic species Probopyrus pandalicola do not consume oxygen at a rate which is a direct function of their body size. Their metabolic rate is dependent mainly on “mode of existence” as well as category of metabolism taking place for a given larval stage.2.2. A comparison of the mean metabolic rates between infected and...