Fauna Ictica Asociada a La Pesqueria De Pez Espada (Xiphias Gladius Linnaeus)

Acuña, Enzo; Grau, Rodrigo

doi:10.4067/s0717-65382002000200025

Cited by 10 publications

(12 citation statements)

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“…The common shark species identified overall in the north‐central Chilean fin trade and their approximate proportions are consistent with information on by‐catch available for industrial Chilean X. gladius fisheries where the predominant species are P. glauca (55%), followed by (in descending order) I. oxyrinchus , L. nasus and A. superciliosus (Acuña et al , 2001, 2002). The high proportions of P. glauca , I. oxyrinchus and L. nasus fins in the trade are also consistent with these species being targets of artisanal fisheries (Bonfil et al , 2005).…”

Section: Discussionsupporting

confidence: 80%

“…The genetic results indicate that at least 10 pelagic shark species are utilized in the north‐central Chilean shark fin trade: A. superciliosus , A. vulpinus , C. obscurus , G. galeus , I. oxyrinchus , I. paucus , L. nasus , P. glauca , S. lewini and S. zygaena . The shark species G. galeus , C. obscurus , I. paucus and S. lewini have not previously been recorded in surveys of by‐catch in artisanal and industrial X. gladius and I. oxyrhynchus fisheries of this region (SERNAPESCA, 1996–1999; Acuña et al , 2001, 2002; Lamilla et al , 2005) or in official Chilean national export statistics (Lamilla et al , 2005).…”

Section: Discussionmentioning

confidence: 99%

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Characterization of the pelagic shark‐fin trade in north‐central Chile by genetic identification and trader surveys

Sebastian

Haye

Shivji

2008

Journal of Fish Biology

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Shark fins have become a highly valued commodity with the major Asian fin-trade centres supplied from global sources, including Chile. With growing concerns about the resilience of shark populations to heavy fishing pressure, there is a need for better information on shark landings to aid management efforts. In the widespread absence of shark landing records especially by species, monitoring the fin trade has been proposed as a way to assess species exploitation levels. Here, the first species assessment of the Chilean shark-fin trade was provided. The goals of this study were to (1) determine the species composition and relative species proportion of sharks utilized in the fin trade, (2) determine the relationship between fin trader market names and species and (3) assess trader accuracy in identifying shark fin species based on fin photographs. Fins were analysed from two different fin drying facilities (n ¼ 654) (secaderos) and two fin-storage warehouses (n ¼ 251). In contrast to official government landing records that only document four species in the landings, molecular species identification of the fins demonstrated that at least 10 pelagic shark species are present in the north-central Chilean shark fin trade: Alopias superciliosus, Alopias vulpinus, Carcharhinus obscurus, Galeorhinus galeus, Isurus oxyrinchus, Isurus paucus, Lamna nasus, Prionace glauca, Sphyrna lewini, Sphyrna zygaena. The species composition of the fins from the secaderos was P. glauca (83Á9%), I. oxyrinchus (13Á6%), L. nasus (1Á7%) and A. superciliosus (0Á2%). There was generally good agreement between market names and single shark species for the trade categories 'Azulejo', 'Tiburon', 'Tintorera', 'Cola de zorro' and 'Martillo'. In contrast, the market category 'Carcharhinus' consisted of a mixture of at least five species. The molecular results also identified two species (S. lewini and I. paucus) not previously recorded in Chilean waters. The fin identification survey given to nine regional traders demonstrated that they were highly accurate in recognizing pictures of fins from P. glauca and I. oxyrinchus. The overall strong concordance between market categories and fins from single species and the trader accuracy in survey fin identification suggests that monitoring the Chilean fin trade by market names will provide a reasonably accurate picture of the volume of sharks landed by species.

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Section: Discussionsupporting

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Characterization of the pelagic shark‐fin trade in north‐central Chile by genetic identification and trader surveys

Sebastian

Haye

Shivji

2008

Journal of Fish Biology

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“…The species richness observed in the current study (20 species), is higher than those found in surveys conducted previously in the region (Ojeda, 1983;Meléndez & Meneses, 1989;Sielfeld & Vargas, 1996;Ojeda et al,, 2000;Acuña & Villarroel, 2002;Acuña et al, 2005;Menares & Sepulveda, 2005). Variation in the reported species richness of cartilaginous fishes within the region among years may reflect the different gear types used, different effort, different depths sampled, and species misidentifications (Pequeño & Lamilla, 1993;.…”

Section: Community Definitioncontrasting

confidence: 72%

Biology, Taxonomy and Distribution of south-east Pacific Cartilaginous Fishes

Bustamante¹

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Cartilaginous fishes (formerly Class Chondrichthyes) belong to an ancient, highly conserved taxonomic group. Despite the evolutionary success of the group, of which there are over 1,000 extant species, many are now threatened with extinction, regionally or globally, primarily as a result of human activities. The main reason for the susceptibility of these species is the K-selected lifehistory traits that characterise many species of cartilaginous fishes such as, slow growth, relatively late maturity, low fecundity and a low rate of potential population increase.Cartilaginous fishes are generally predators that occupy the upper levels of marine food webs. They are naturally rare compared with other fishes, but have a vital role in the maintenance of marine ecosystem balance. Their biological characters make them highly susceptible to population depletion as a result of anthropogenic activity, including targeted fisheries, bycatch and habitat loss or modification. The life history strategy of cartilaginous fish species suggests the need for conservative management measurements that ensure sustainability with compatible fishery activities.Cartilaginous fishes constitute an important component of the marine ecosystem in the southeast Pacific Ocean. Over 93 species of sharks, skates, rays and chimaeras inhabit Chilean waters and at least half of them are subjected to intense fishing pressure in a diverse range of fisheries.Many of these species are vulnerable to population collapse. Even though they are not directly targeted in commercial fisheries, they are caught as bycatch by longline, gillnet and trawl net fisheries within Chile's Exclusive Economic Zone. Limited biological information is available to assess the potential impacts that anthropogenic disturbance may produce in populations of cartilaginous fishes, and this thesis aims to improve our knowledge of the taxonomy, life history and fisheries of cartilaginous fishes commonly caught in Chilean waters.The cartilaginous ichthyofauna in Chile was assessed through extensive surveys conducted in coastal artisanal, small to medium scale fisheries and larger semi-industrial oceanic fisheries. Here we review the taxonomy and fishery biology from a relatively basic level (checklist of living species, morphological descriptions and biology) towards complex conservation issues (distribution, habitat use and fishery mortality). However, these results represent the first attempt to quantify the abundance and distribution ranges of sharks, skates and chimaeras commonly caught along the Chilean coast. New biological and ecological data have complemented actual knowledge of cartilaginous fish dynamics in relation to fishing activity in the south-east Pacific Ocean.As part of this thesis, three new species have been added to the Chilean cartilaginous fauna (Chapter 2): the spinetail mobula Mobula japanica, the eastern Pacific black ghostshark Hydrolagus -iimelanophasma and the thickbody skate Amblyraja frerichsi. The inclusion of these species improves identificatio...

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“…With the exception of Pristiophorus sp., the rest of the elasmobranch taxa found in this study are related to the living species distributed along the Pacifi c coast of South America (e.g. Egaña & McCosker, 1984;Acuña et al, 2002;Hernández & Lamilla, 2004;Hernández et al, 2008).…”

Section: Isurus Rafi Nesque 1810mentioning

confidence: 82%

Late Neogene Elasmobranch Fauna From The Coquimbo Formation, Chile

Staig¹,

Hernández²,

López³

et al. 2015

Rev. bras. paleontol.

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− Neogene marine sediments from Chilean geological formations contain a diverse marine fossil fauna. In Chile, the "Norte Chico" (27°S to 32°S) is composed of two important sedimentary marine deposits, the Bahía Inglesa and Coquimbo formations. Diverse vertebrate taxa including fi sh, birds, mammals and abundant chondrichthyans have been described from Bahía Inglesa Formation. However, the vertebrate fauna from Coquimbo Formation has been poorly documented. Based upon fi eld trips and the analysis of collections from the Coquimbo Formation, the elasmobranch fossil fauna is composed of at least nine taxa, two of which are extinct (Carcharocles megalodon and Carcharodon plicatilis). The rest of the taxa are related with living elasmobranch species that are inhabitants of the Eastern Pacifi c Ocean and Tropical America coast.

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Fauna Ictica Asociada a La Pesqueria De Pez Espada (Xiphias Gladius Linnaeus)

Cited by 10 publications

References 0 publications

Characterization of the pelagic shark‐fin trade in north‐central Chile by genetic identification and trader surveys

Characterization of the pelagic shark‐fin trade in north‐central Chile by genetic identification and trader surveys

Biology, Taxonomy and Distribution of south-east Pacific Cartilaginous Fishes

Late Neogene Elasmobranch Fauna From The Coquimbo Formation, Chile

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