Cambios en la morfometría bucal y su relación con la dieta de Thyrsites atun (Euphrasen, 1791) en el centro-sur de Chile

Duarte, Freddy; Ibáñez, Christian M.; Chong, Javier

doi:10.4067/s0716-078x2007000400002

Cited by 3 publications

(5 citation statements)

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“…It is particularly interesting the high trophic overlap between ancient snoek and hake. Currently, snoek inhabits the coastal waters of the cold temperate Southern Hemisphere with SST between 13°C and 18°C (Bianchi et al, ), including Chile (Bahamonde, ; Duarte et al, ), the western Atlantic coast of South Africa (Griffiths, 2002, ; Isaacs, ), the southern coast of Australia and the coast of New Zealand (Augé, Lalas, Davis, & Chilvers, ; Mehl, ). Nowadays, snoek is absent from the coasts of Argentina and the subantarctic waters of the Beagle Channel, where the SST is between 5°C and 10°C (Lloris & Rucabado, ; López et al, ; Zangrando, Ponce, et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…including Chile (Bahamonde, 1951;Duarte et al, 2007), the western Atlantic coast of South Africa (Griffiths, 2002(Griffiths, , 2002(Griffiths, , 2003Isaacs, 2013), the southern coast of Australia and the coast of New Zealand (Augé, Lalas, Davis, & Chilvers, 2012;Mehl, 1969). Nowadays, snoek is absent from the coasts of Argentina and the subantarctic waters of the Beagle Channel, where the SST is between 5°C and 10°C (Lloris & Rucabado, 1991;López et al, 1996;Zangrando, Ponce, et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Increasing SST in a climate warming scenario may allow the recolonization of the Beagle Channel by snoek from the cold temperate waters off Chile, where it abounds (Bahamonde, 1951;Duarte, Ibáñez, & Chong, 2007). Elsewhere, snoek prey primarily on small pelagic fishes (Bahamonde, 1951;Duarte et al, 2007;Griffiths, 2002Griffiths, , 2002Griffiths, , 2003 and hence snoek may overlap with hake if it reinvades the South-Western Atlantic waters. Furthermore, legal protection is expected to result in larger seal populations, although recovery might be affected by declining levels of marine productivity since the Middle Holocene (Saporiti, Bala, et al, 2014).…”

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confidence: 99%

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Back to the future? Late Holocene marine food web structure in a warm climatic phase as a predictor of trophodynamics in a warmer South‐Western Atlantic Ocean

Bas

Godino

Álvarez

et al. 2018

Global Change Biology

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Stable carbon and nitrogen isotope ratios in the skeletal elements of both ancient and modern marine species from the Beagle Channel were used to compare the structure of Late Holocene and modern food webs, and predict potential changes as a result of a Sea Surface Temperature (SST) increase in the region. Complementary, ancient and modern shells of limpets and mussels were isotopically analysed to explore changes in the isotopic baseline and compare marine food webs through time after an appropriate correction for baseline shifts. Results confirmed a declining pattern of marine primary productivity during the Late Holocene in the Beagle Channel. In general, the isotopic niches overlapped largely in the ancient food web in comparison to the current marine one, with the exception of that of cormorants (Phalacrocorax sp.). Our data suggest that all the species that have undergone intense human exploitation (Arctocephalus australis, Otaria flavescens and Merluccius sp.) significantly increased their trophic levels. The most important finding of this work was the very high isotopic overlap between snoek (Thyrsites atun) and hake (Merluccius sp.) during the Late Holocene. Increasing SST as a result of global warming could favour the recolonization of the southern South‐Western Atlantic Ocean by snoek from the South‐Eastern Pacific Ocean, with a potential impact on the landings of the economically important Argentine and Austral hake. These findings highlight the relevance of using zooarchaeological remains for providing predictions about marine food webs changes in the near future.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Back to the future? Late Holocene marine food web structure in a warm climatic phase as a predictor of trophodynamics in a warmer South‐Western Atlantic Ocean

Bas

Godino

Álvarez

et al. 2018

Global Change Biology

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“…De esta forma, pueden permanecer cerca de la costa gracias a su capacidad de retener calor y mantener sus cuerpos más calientes que la temperatura circundante (Graham & Dickson 2000, Sepúlveda et al 2007. Por otra parte, su presencia como fauna acompañante de la pesquería de T. atun en BC Chile (Tabla 1), deja en evidencia que tal como ocurre en aguas costeras de Nueva Zelanda (O'Driscoll & McClatchie 1998), la especie cuenta con registros junto a T. murphyi forrajeando Euphausida, Cephalopoda y pequeños pelágicos (sardinas y anchoas) (Yatsu 1995, Bertrand et al 2004, Duarte et al 2007, Reyes et al 2017.…”

Section: Discussionunclassified

Presencia de atún lanzón en la costa sur de Chile: Potencial nuevo recurso para la pesca artesanal

Reyes

Hüne

Olguín

et al. 2019

Rev. biol. mar. oceanogr.

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La presente investigación analizó la abundante y masiva presencia de “atún lanzón”, Allothunnus fallai en 1.026 m.n. costeras del sur de Chile (37°03’-51°49’S), entre 2014 y 2017, incluidos el interior de los canales Magallánicos de Patagonia chilena. Se descartó que incrementos locales de la TSM provocados por El Niño causaran la presencia de la especie, cuyo arribo a la costa chilena se asociaría a la disminución de la producción primaria oceánica, provocando un acercamiento a la costa en busca de alimento. Producto de su abundancia, en 2017 y 2018 el Estado Chileno oficializó al “atún lanzón” como nuevo recurso pesquero artesanal chileno.

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“…The snake mackerel (Thyrsites atun) is a carnivorous fish that feeds primarily on schooling marine animals, including Euphausiacea in oceanic areas and squid (Loligo gahi) and small fish, such as anchovies (Engraulis ringens), sardines (Strangomera bentincki), and mote sculpins (Normanichthys crockeri), in neritic areas (DUARTE et al, 2007). The presence of parasites can reflect past and present relationships with their hosts, such as trophic relationships, phylogenetic affinities and migrations (RODRIGUEZ; GEORGE-NASCIMENTO, 1996).…”

Section: Introductionmentioning

confidence: 99%

Use of negative binomial distribution to describe the presence of Anisakis in Thyrsites atun

Peña-Rehbein

Ríos-Escalante

2012

Rev. Bras. Parasitol. Vet.

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Nematodes of the genus Anisakis have marine fishes as intermediate hosts. One of these hosts is Thyrsites atun, an important fishery resource in Chile between 38 and 41° S. This paper describes the frequency and number of Anisakis nematodes in the internal organs of Thyrsites atun. An analysis based on spatial distribution models showed that the parasites tend to be clustered. The variation in the number of parasites per host could be described by the negative binomial distribution. The maximum observed number of parasites was nine parasites per host. The environmental and zoonotic aspects of the study are also discussed.

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Cambios en la morfometría bucal y su relación con la dieta de Thyrsites atun (Euphrasen, 1791) en el centro-sur de Chile

Cited by 3 publications

References 10 publications

Back to the future? Late Holocene marine food web structure in a warm climatic phase as a predictor of trophodynamics in a warmer South‐Western Atlantic Ocean

Back to the future? Late Holocene marine food web structure in a warm climatic phase as a predictor of trophodynamics in a warmer South‐Western Atlantic Ocean

Presencia de atún lanzón en la costa sur de Chile: Potencial nuevo recurso para la pesca artesanal

Use of negative binomial distribution to describe the presence of Anisakis in Thyrsites atun

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