Reproductive ecology of demersal elasmobranchs from a data-deficient fishery, Pacific of Costa Rica, Central America

Clarke, Tayler M.; Espinoza, Mario; Wehrtmann, Ingo S.

doi:10.1016/j.fishres.2014.04.003

Cited by 27 publications

(47 citation statements)

References 41 publications

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“…Future research on the life history traits of these species is also necessary and will allow us to identify vulnerable species and redirect conservation efforts. The interaction between the shrimp trawl fishery and the elasmobranch assemblage may be comparable within the different countries of Central America (López-Martínez et al, 2010;Clarke et al, 2014). Therefore, the results of this study may serve as biological information that can support the development of management strategies in Central America.…”

Section: Elasmobranch Assemblagesmentioning

confidence: 74%

“…A total of 4 deepwater surveys were conducted, 2 during the rainy season (August 2008 andMay 2009) and 2 during the dry season (March 2010(March tínez et al, 2010Clarke et al, 2014). The best information available is obtained from the Pacific coast of Colombia, where significant changes in elasmobranch species composition and abundance have been detected since the 1990s (Mejía-Falla and Navia 1 ).…”

Section: Samplingmentioning

confidence: 99%

“…In the remaining countries of the ETP, even this basic information is not available. Scarcity of published data has hindered attempts to estimate the effect of shrimp trawl fisheries on the elasmobranch assemblage in the ETP (Espinoza et al, 2012;Espinoza et al, 2013;Clarke et al, 2014).…”

Section: Samplingmentioning

confidence: 99%

“…Maturity stage was assessed by macroscopic examination of the reproductive tract (Conrath, 2005;Clarke et al, 2014).…”

Section: Samplingmentioning

confidence: 99%

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Elasmobranch bycatch associated with the shrimp trawl fishery off the Pacific coast of Costa Rica, Central America

Clarke¹,

Espinoza²,

Ahrens³

et al. 2015

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Abstract-Demersal sharks and raysare common yet vulnerable components of the bycatch in tropical bottom-trawl fisheries. Little is known about the elasmobranch assemblages associated with most of these fisheries, particularly within the eastern tropical Pacific. This study characterized the elasmobranch assemblage associated with the shrimp trawl fishery along the Pacific coast of Costa Rica. Between August 2008 and August 2012, 346 trawl hauls were conducted at depths of 18-350 m. These hauls resulted in a sample of 4564 elasmobranchs from 25 species and 13 families. The Panamic stingray (Urotrygon aspidura), rasptail skate (Raja velezi), brown smoothhound (Mustelus henlei), and witch guitarfish (Zapteryx xyster) accounted for more than 66% of the elasmobranch abundance within the bycatch. Depth was the main factor influencing the elasmobranch assemblage; species richness was significantly higher at depths <100 m than at other depths. Two groups of elasmobranchs were identified: the first was found in shallow waters (<50 m), and the second was observed at depths of 50-350 m. Sex and size segregation patterns are also influenced by depth. Moreover, we documented the shift of the bottomtrawl fishery toward shallow-water resources-a change that could be problematic considering that elasmobranch diversity is higher in shallow waters.

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Section: Elasmobranch Assemblagesmentioning

confidence: 74%

Section: Samplingmentioning

confidence: 99%

Section: Samplingmentioning

confidence: 99%

“…Maturity stage was assessed by macroscopic examination of the reproductive tract (Conrath, 2005;Clarke et al, 2014).…”

Section: Samplingmentioning

confidence: 99%

See 2 more Smart Citations

Elasmobranch bycatch associated with the shrimp trawl fishery off the Pacific coast of Costa Rica, Central America

Clarke¹,

Espinoza²,

Ahrens³

et al. 2015

Self Cite

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“…It is known for its diversity of fishes (Chicas 1995), decapods (Echeverría-Sáenz et al 2003), and polychaetes (Sibaja-Cordero & Echeverría-Sáenz 2015). Moreover, this mangrove supports important local ark-clam fisheries (Vega 1994) and is a probable nursery ground for several elasmobranch species (Clarke et al 2014). However, the soft-bottom habitats in brackishwaters outside Térraba-Sierpe have been poorly studied.…”

Section: Introductionmentioning

confidence: 99%

Echinoderm diversity of a tropical estuary in the largest river basin of the Costa Rican Pacific, Eastern Tropical Pacific

Azofeifa-Solano

Mena

Barrientos³

et al. 2017

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Abstract. Echinoderms within the Eastern Tropical Pacifichave mainly been studied in association with coral reefs. Investigations on echinoderms associated with soft-bottoms and estuaries are still scarce. The present study reports on the echinoderm species inhabiting the soft-bottom sediments of shallow-brackish waters adjacent to the largest river basin along the Pacific coast of Costa Rica, Térraba-Sierpe wetland. Nine species were recorded, three of them new records for Costa Rica: Luidia columbia, L. latiradiata, and L. superba. The most common species were L. columbia, Astropecten armatus, A. regalis, and L. latiradiata. This contributes towards current knowledge on the biodiversity of Térraba-Sierpe wetland and should be considered as a baseline upon which to monitor the effects of future impacts on this important mangrove area.

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The effect of biogeographic and phylogeographic barriers on gene flow in the brown smoothhound shark, Mustelus henlei, in the northeastern Pacific

Chabot

Espinoza

Mascareñas‐Osorio³

et al. 2015

Ecology and Evolution

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We assessed the effects of the prominent biogeographic (Point Conception and the Peninsula of Baja California) and phylogeographic barriers (Los Angeles Region) of the northeastern Pacific on the population connectivity of the brown smoothhound shark, Mustelus henlei (Triakidae). Data from the mitochondrial control region and six nuclear microsatellite loci revealed significant population structure among three populations: northern (San Francisco), central (Santa Barbara, Santa Catalina, Punta Lobos, and San Felipe), and southern (Costa Rica). Patterns of long-term and contemporary migration were incongruent, with long-term migration being asymmetric and occurring in a north to south direction and a lack of significant contemporary migration observed between localities with the exception of Punta Lobos that contributed migrants to all localities within the central population. Our findings indicate that Point Conception may be restricting gene flow between the northern and central populations whereas barriers to gene flow within the central population would seem to be ineffective; additionally, a contemporary expansion of tropical M. henlei into subtropical and temperate waters may have been observed.

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Reproductive ecology of demersal elasmobranchs from a data-deficient fishery, Pacific of Costa Rica, Central America

Cited by 27 publications

References 41 publications

Elasmobranch bycatch associated with the shrimp trawl fishery off the Pacific coast of Costa Rica, Central America

Elasmobranch bycatch associated with the shrimp trawl fishery off the Pacific coast of Costa Rica, Central America

Echinoderm diversity of a tropical estuary in the largest river basin of the Costa Rican Pacific, Eastern Tropical Pacific

The effect of biogeographic and phylogeographic barriers on gene flow in the brown smoothhound shark, Mustelus henlei, in the northeastern Pacific

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