Teresa ModestoUniversidade do Algarve | UALG · Faculty of Sciences and Technology
Teresa Modesto
PhD
About
21
Publications
2,997
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376
Citations
Introduction
Teresa Modesto currently works at the Faculty of Sciences and Technology, Universidade do Algarve. Teresa does research in Fish Reproduction, Fish Endocrinology and Physiology.
Skills and Expertise
Additional affiliations
June 2003 - present
Position
- Professor (Assistant)
Description
- Teaching in Biology, Animal Physiology and Marine Ecophysiology
Publications
Publications (21)
Anthropogenic noise is a growing threat to marine organisms, including fish. Yet very few studies have addressed the impact of anthropogenic noise on fish reproduction, especially in situ. In this study, we investigated the impacts of boat noise exposure in the reproductive success of wild Lusitanian toadfish (Halobatrachus didactylus), a species t...
The effect of temperature on oxygen consumption in the oyster Crassostrea gigas was studied as a strategy to define the metabolic rates for use in multitrophic system. Oysters were taken to the laboratory, acclimated for 5 days to four differente temperatures (18, 21, 25 and 28 °C), and transferred to respiration chambers for individual measurement...
In teleost fish sex steroids are essential for gonadal function and have marked effects in reproductive and agonistic behaviour and in the expression of secondary sexual characteristics. The Lusitanian toadfish, Halobatrachus didactylus, has two male morphotypes: type I males are territorial nest-holders and have large accessory glands while type I...
In many fish species in which males guard nests with their eggs, parental care directed to genetically unrelated offspring may arise for example from nest takeovers or cuckoldry. Lusitanian toadfish (Halobatrachus didactylus) has exclusive male parental care and face intensive nest competition during the breeding season that may lead to care of fos...
The relation between acoustic signaling and reproductive success is important to understand the evolution of vocal communi-cation systems and has been well studied in several taxa but never clearly shown in fish. This study aims to investigate whether vocal behavior affects the reproductive success in the Lusitanian toadfish (Halobatrachus didactyl...
Estradiol (E(2)) increases circulating calcium and phosphate levels in fish, thus acting as a hypercalcemic and hyperphosphatemic factor during periods of high calcium requirements, such as during vitellogenesis. Since parathyroid hormone (PTH)-related protein (PTHrP) has been shown to be calciotropic in fish, we hypothesized that the two hormones...
The developing oocyte is surrounded by an acellular envelope that is composed of 2-4 isoforms of zona pellucida (ZP) proteins. The ZP proteins comprise the ZP1, ZP2, ZP3, and ZPX isoforms. While ZP1 (ZPB) and ZP3 (ZPC) are present in all species, ZP2 (ZPA) is not found in teleost fish and ZPX is not found in mammals. In the present study, we identi...
17,20β,21-Trihydroxy-4-pregnen-3-one (17,20β,21-P) was identified as the major metabolite of incubations of Lusitanian toadfish Halobatrachus didactylus ovarian follicles with [3H]-17hydroxyprogesterone. The potency of several steroids in inducing germinal vesicle breakdown of follicle-enclosed oocytes of Lusitanian toadfish was systematically exam...
The swimbladder and associated sonic muscle of the Lusitanian toadfish Halobatrachus didactylus increase in size throughout life and are, respectively, 25% and 30% larger in type I (nest-holder) males than females, which may generate sexual differences in sound production. Sexual dimorphism in swimbladder is also evident in the morphological featur...
The Lusitanian toadfish has group synchronous oocytes, which grow from November until June-July when they are released probably as a single batch. Blood plasma levels of estradiol-17beta (E(2)) and testosterone (T) increase during vitellogenesis and drop rapidly during final maturation and ovulation, when 17,20beta, 21-trihydroxy-4-pregnen-3-one (1...
17,20β,21-Trihydroxy-4-pregnen-3-one (17,20β, 21-P) was identified as the major metabolite of incubations of Lusitanian toadfish Halobatrachus didactylus ovarian follicles with [3H]-17hydroxyprogesterone. The potency of several steroids in inducing germinal vesicle breakdown of follicle-enclosed oocytes of Lusitanian toadfish was systematically exa...
Several batrachoidids have been known to produce sounds associated with courtship and agonistic interactions, and their repertoires have been studied acoustically and behaviourally. In contrast, sound production of the Lusitanian toadfish Halobatrachus didactylus, although often noted, has not been acoustically studied.This sedentary predator of No...
Projects
Projects (3)
Project EMREP’s main goal is to improve fishing data collection and reporting capabilities by modernizing electronic data management systems to maximize the potential benefits from the Blue Economy. Three main activities will be conducted in this project, namely i) stakeholder engagement and requirement analysis; ii) development and customization of Electronic Data collection and Reporting tools (iEMR); and iii) field testing and application of iEMR for scientific purposes. This will be achieved by, customising, deploying and testing the Olrac electronic fishing logbook from the promotor company OLSPS. Olrac will collect detailed operational and environmental data coupled with gear sensors (e.g. sea temperature, depth and salinity) and synchronize it with video footage and images collected using onboard cameras from the Norwegian partner company Imenco. The collection of this data is crucial to form part of a PhD study from the partner University of Algarve, which will evaluate the bycatch of elasmobranchs from CBT in the south of Portugal.
Not only will the customized Olrac iEMR will improve the quality of fisheries data for scientific and control purposes, but fishers will also benefit from a more selective fishery through a bycatch avoidance tool, and a more cost-effective system compared to industry funded at-sea observers, and the existing compliant paper and electronic logbooks. Furthermore, project EMREP will complies with the requirements of the Marine Strategy Framework Directive by including explicit targets to bring about more accurate, comprehensive, and timely data through a process of automation and standardization of both self-reported vessel data and at sea monitoring.
Numerous teleost fish species produce sounds during agonistic and reproductive behaviour. With this project used the highly vocal batrachoidids fish as a model (the Lusitanian toadfish, Halobatrachus didactylus), and aimed to (1) ascertain the relation between acoustic signalling and reproductive success with a combination of muting experiments and parentage fingerprinting analysis; (2) test if vocal activity signals parental ability by measuring offspring survival and testing the ability to the defend their nest from intruders; (3) test the role of sound production and its modulation by the major teleost androgen (11 keto-testosterone, 11KT) in male-male assessment during territorial defence with muting experiments.
