Alimentación y relaciones tróficas del pez espada (Xiphias gladius Linnaeus, 1758), frente a Chile centro-norte durante 2005

Letelier, Sergio; Meléndez, Roberto; Carreño, Esteban; López, Sebastián; Barría, Patricio

doi:10.3856/vol37-issue1-fulltext-9

Cited by 25 publications

(20 citation statements)

References 13 publications

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“…Authors like Zavala-Camin (1981), Stillwell & Kohler (1985), Simões & Andrade (2000) and VaskeJúnior (2000) have registered Illex argentinus and Ommastrephes bartramii as the most commonly identified Ommastrephidae species. In contrast, the stomach contents of X. gladius caught at the Pacific Ocean were mainly composed by the species Dosidicus gigas and Todarodes filipovae (Ibañez et al 2004, Castillo et al 2007, Letelier et al 2009). Other cephalopods as those who belong to the Loliginidae family commonly represent a low importance as food to X. gladius, as only in one stomach from 168 analyzed by Stillwell & Kohler (1985) contained such kind of squid.…”

Section: Discussionmentioning

confidence: 92%

“…In a similar way, crustaceans are reported to constitute a less important item to the fish diet related to these species, and may also be considered as an accidental item (Letelier et al 2009). Notwithstanding this idea, decapod crustaceans have also been reported by Zavala-Camin (1981) and Chancollon et al (2006).…”

Section: Discussionmentioning

confidence: 97%

“…13, no. 1 Letelier et al 2009). Meanwhile, studies made for the Mediterranean Sea (Relini et al 1995), at the northeast Atlantic (Chancollon et al 2006) and at the Indic Ocean (Marsac & Potier 2001, Potier et al 2007) show a precisely converse pattern, thus classifying the swordfish as a primarily ictiophagic predator.…”

Section: Discussionmentioning

confidence: 99%

“…Meanwhile, studies made for the Mediterranean Sea (Relini et al 1995), at the northeast Atlantic (Chancollon et al 2006) and at the Indic Ocean (Marsac & Potier 2001, Potier et al 2007) show a precisely converse pattern, thus classifying the swordfish as a primarily ictiophagic predator. The X. gladius diet may vary consistently at distinct habitats and seasons, as a consequence of the variations of the distinct prey population dynamics (Letelier et al 2009). Pelagic mollusks of the Ommastrephidae family are commonly found as food items of X. gladius.…”

Section: Discussionmentioning

confidence: 99%

“…As it is known to be an opportunistic predator, the swordfish uses to show a broad alimentary spectrum, feeding on cephalopods, fish and crustaceans (Clarke et al 1995, Figueiredo & Menezes 2000. Its diet composition has been studied in the Mediterranean Sea (Bello 1991);Pacific Ocean (Ibañez et al 2004, Castillo et al 2007, Letelier et al 2009); at the Indic Ocean (Potier et al 2007) and the Atlantic Ocean (Stillwell & Kohler 1985Simões & Andrade 2000, Satoh et al 2004, Chancollon et al 2006. For Brazilian waters, besides the studies of Zavala-Camin (1981), Mello (1992) and Vaske-Júnior (2000), few other studies are registered.…”

Section: Introductionmentioning

confidence: 99%

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Description of diet of pelagic fish in the southwestern Atlantic, Brazil

2013

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This study reveals the food composition of pelagic fishes living in the southwestern Atlantic Ocean. As such more common pelagic species are considered to be top predators, the study proposes to know what constitutes their main food. Fish are not commonly found within their stomach contents, but instead, cephalopods are their most common food. As can be observed, Teuthida cephalopods compose their principal diet. The stomach contents of specimens of Xiphias gladius, Thunnus albacares, T. obesus, T. alalunga, Isurus oxyrinchus and Alopias superciliosus caught during July 2007 to June 2009 by using tuna longliners were studied. Teuthida cephalopods constitute the main food item for the three tuna species, while X. gladius feeds mainly on Ommastrephidae cephalopods. Though the differences among the kinds of cephalopods exist, they constitute the principal resource these fish use to live at least in the southern Atlantic Ocean.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Description of diet of pelagic fish in the southwestern Atlantic, Brazil

2013

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Fish vertebrae as archeological biomarkers of past marine ecological conditions: Comparison of mercury levels in Chilean swordfish between the Middle Holocene and the modern period

Porsmoguer

Bouchoucha

Marco-Mirallès

et al. 2021

Intl J of Osteoarchaeology

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The ocean has always been a source of inspiration for past and present civilizations, especially for those involved in fishing activities. The regular fishing of large pelagic fish by past societies using harpoons has been demonstrated, with several studies reporting the discovery of an important fishery of large pelagic fish (including swordfish) dating from as early as the sixth millennium BCE on the North Chilean Pacific Coast. The swordfish (Xiphias gladius) is a cosmopolitan, highly migratory species found in all warm and temperate oceans and seas, and mercury is known to bioamplify along food webs, increasing with the trophic level of organisms up to these top predators. This study, therefore, analyzes and compares the mercury levels of archeological and modern vertebrae in swordfish. The archeological fish remains were recovered during excavation of the Zapatero archeological site on the northern coast of Chile, and the modern vertebrae were collected from specimens caught in the Pacific Ocean. The archeological vertebrae showed lower levels of mercury in comparison with those of current individuals, despite their larger size. However, the elevated Hg levels in archeological vertebrae proved the presence of naturally occurring mercury in the mid‐Holocene. Analyses on modern vertebrae confirmed the anthropic origin of mercury in the marine food web. Mercury biomagnifies through the marine food chain to swordfish (and humans) and did so even during the Holocene (bioaccumulation phenomenon). This study evidences that vertebrae and bones are potentially good biomarkers of mercury, including for archeological fish remains, and that the possible harmful effects on the health of past human communities can be analyzed and explained by the high consumption of fish.

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