Records of bycatch of Hippocampus patagonicus (Pisces: Syngnathidae) in commercial fishing in southern Brazil

Silveira, Rosana Beatriz; Barcelos, Brenda Tusi; Machado, Rodrigo; Oliveira, Larissa Rosa de; Santos-Silva, José Rodrigo

doi:10.3856/vol46-issue4-fulltext-12

Cited by 4 publications

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“…Among the various species to be protected, called target species of PAN Corais, and listed in the list of endangered species, are seahorses. The data on H. patagonicus bycatch (Silveira et al, 2018) and the biology data presented in this study point to the need for alternative conservation strategies beyond those presented to date, considering that H. patagonicus does not occur in coral environments protected by PAN Corais. Conservation strategies should be expanded not only to include H. patagonicus, but also H. erectus, whose biology is poorly known in Brazil.…”

Section: Conclusion and Suggestionsmentioning

confidence: 70%

“…1), from February to November 2012 and November and December 2014, respectively. The biological material was collected according to Silveira et al (2018) and came from two trawlers in RS and one in RJ.…”

Section: Methodsmentioning

confidence: 99%

“…In Argentina, H. patagonicus can be found in estuaries (Piacentino & Luzzatto, 2004;Storero & González, 2008), but in Brazil, this species occurs exclusively in the sea, where it has been collected as bycatch at depths between 11 and 57 m and a distance of 0.77 to 78 nm (nautical miles) from the coast (Silveira et al, 2018). More recent observations show H. patagonicus at depths of up to 100 m (Silveira, unpubl.…”

Section: Introductionmentioning

confidence: 99%

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Biology of Hippocampus patagonicus (Syngnathidae) in Brazilian waters. A species threatened with extinction, with suggestions for the conservation of seahorses in Brazil

Silveira

Silva

Benício

2020

Lat. Am. J. Aquat. Res.

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Specimens of Hippocampus patagonicus obtained in the bycatch of trawling in the states of Rio Grande do Sul (RS) and Rio de Janeiro (RJ) were collected in 2012 (n = 199) and 2014 (n = 157), respectively. Mean height of females of reproductive age in RS was 8.89 ± 1.9 cm, with the fecundity of 366 ± 195.8 eggs per clutch, and for males of reproductive age, height was 8.79 ± 1.86 cm and weight 2.3 ± 1.67 g, with 404 ± 99 embryos at each gestation. In RJ, height was 9.69 ± 1.05 cm and weight 2.9 ± 0.9 g, with the fecundity of 277 ± 95.06 eggs per clutch, and for males, height was 10.06 ± 1.02 cm and weight 3.68 ± 1.18 g, with the fecundity of 156.38 ± 66 embryos at each gestation. The equations obtained from the weight (W) to height (H) ratio were: W = 0.002 H3.182, R2= 0.947 (RS males); W = 0.004 H2.914, R2= 0.949 (RS females); W = 0.0050 H2.838, R2= 0.793 (RJ males); W = 0.014 H2.355, R2= 0.733 (RJ females). RS females produced more eggs (P = 0.023), and males incubated more embryos (P = 0.000) than those of RJ. The mean height of brood pouch formation in males was 4.69 ± 0.48 cm, 95% CI [4.53; 4.86], while the mean height at first sexual maturity was 8.34 cm (95% CI [7.481; 9.046]). Alternative strategies need to be developed for the conservation of H. patagonicus in Brazil.

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Section: Conclusion and Suggestionsmentioning

confidence: 70%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biology of Hippocampus patagonicus (Syngnathidae) in Brazilian waters. A species threatened with extinction, with suggestions for the conservation of seahorses in Brazil

Silveira

Silva

Benício

2020

Lat. Am. J. Aquat. Res.

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“…Seahorse species (Syngnathidae: Hippocampus) are also among the fishes that are subject to overfishing and other anthropogenic disturbances, such as habitat loss [29]. Millions of seahorses are collected each year globally to meet the demand of the traditional Chinese medicine market and the marine ornamental industry [28,[30][31][32][33][34], which are mostly caught by nonselective fishing methods and partly as bycatch [35][36][37][38][39][40] but also by hand [41]. Hippocampus species range in maximum body length from about 1.5 cm in length to 35 cm (Table 1) and are characterized by their fused jaws, prehensile tail, bony plated skeleton, and typical upright posture [42,43].…”

Section: International Trade In Seahorses (Hippocampus Spp)mentioning

confidence: 99%

Diversity of Seahorse Species (Hippocampus spp.) in the International Aquarium Trade

Koning

Hoeksema

2021

Diversity

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Seahorses (Hippocampus spp.) are threatened as a result of habitat degradation and overfishing. They have commercial value as traditional medicine, curio objects, and pets in the aquarium industry. There are 48 valid species, 27 of which are represented in the international aquarium trade. Most species in the aquarium industry are relatively large and were described early in the history of seahorse taxonomy. In 2002, seahorses became the first marine fishes for which the international trade became regulated by CITES (Convention for the International Trade in Endangered Species of Wild Fauna and Flora), with implementation in 2004. Since then, aquaculture has been developed to improve the sustainability of the seahorse trade. This review provides analyses of the roles of wild-caught and cultured individuals in the international aquarium trade of various Hippocampus species for the period 1997–2018. For all species, trade numbers declined after 2011. The proportion of cultured seahorses in the aquarium trade increased rapidly after their listing in CITES, although the industry is still struggling to produce large numbers of young in a cost-effective way, and its economic viability is technically challenging in terms of diet and disease. Whether seahorse aquaculture can benefit wild populations will largely depend on its capacity to provide an alternative livelihood for subsistence fishers in the source countries. For most species, CITES trade records of live animals in the aquarium industry started a few years earlier than those of dead bodies in the traditional medicine trade, despite the latter being 15 times higher in number. The use of DNA analysis in the species identification of seahorses has predominantly been applied to animals in the traditional medicine market, but not to the aquarium trade. Genetic tools have already been used in the description of new species and will also help to discover new species and in various other kinds of applications.

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Feeding ecology of seahorses (Syngnathidae: Hippocampus) on the coast of Rio de Janeiro state, Brazil

Silveira¹,

Souza²,

Santos³

et al. 2022

Regional Studies in Marine Science

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Records of bycatch of Hippocampus patagonicus (Pisces: Syngnathidae) in commercial fishing in southern Brazil

Cited by 4 publications

References 0 publications

Biology of Hippocampus patagonicus (Syngnathidae) in Brazilian waters. A species threatened with extinction, with suggestions for the conservation of seahorses in Brazil

Biology of Hippocampus patagonicus (Syngnathidae) in Brazilian waters. A species threatened with extinction, with suggestions for the conservation of seahorses in Brazil

Diversity of Seahorse Species (Hippocampus spp.) in the International Aquarium Trade

Feeding ecology of seahorses (Syngnathidae: Hippocampus) on the coast of Rio de Janeiro state, Brazil

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