Food and feeding of Argentine hake (Merluccius hubbsi) larvae in the Patagonian nursery ground

Temperoni, Brenda; Viñas, María Delia

doi:10.1016/j.fishres.2013.08.008

Cited by 32 publications

(28 citation statements)

References 41 publications

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“…It has been suggested that this distribution might respond to certain temperature and salinity ranges as well as to zooplankton prey concentrations (Louge et al ., ). Pre‐recruits prey mainly upon euphausiids and amphipods during austral summer, although decapods are included in the diet in a lower proportion (Temperoni et al ., ). However, the spatial variability of these macrozooplankton prey within the SJG is poorly known (Pérez Seijas et al ., ; Viñas et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Effect of nursery ground variability on condition of age 0+ year Merluccius hubbsi

Temperoni

Massa

Derisio

et al. 2018

Journal of Fish Biology

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This study examined the southern or Patagonian (41°–55° S) stock of Argentine hake Merluccius hubbsi, the more abundant of the two stocks on the Argentinean continental shelf. Pre‐recruits (age 0+ year individuals) of this stock settle and grow in the San Jorge Gulf (45°–47° S, 65° 30′ W), a complex habitat with large spatial variability in environmental features. Relative condition factor, hepatosomatic index, lipid content and fatty‐acid composition of muscle and liver, and diet information were combined with physical and biological data to evaluate: how nutritional status of age 0+ year hake varies spatially within the nursery ground; whether changes in condition are related to environmental factors and feeding; whether the indices are interchangeable metrics of condition. Both morphometric and biochemical indices showed dissimilar spatial trends; enhanced liver‐based condition coincided with low salinity nutrient rich waters, higher chlorophyll‐a values and abundances of Euphausia spp., the preferred prey at most stations, suggesting a bottom‐up effect on age 0+ year hake condition. Diminished condition at stations where Thermisto gaudichaudii was the main prey could derive from lower prey quality in terms of energy density and essential fatty acids content. Coastal waters of the gulf would be essential habitats for M. hubbsi pre‐recruits. Future monitoring of condition with liver‐based indices is encouraged in the gulf, where interannual increasing trends of satellite‐derived chlorophyll‐a values have been observed, which could have implications for recruitment of the species.

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Section: Introductionmentioning

confidence: 99%

Effect of nursery ground variability on condition of age 0+ year Merluccius hubbsi

Temperoni

Massa

Derisio

et al. 2018

Journal of Fish Biology

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“…Owing to Argentine hake's commercial importance in the South Atlantic Ocean, its high abundance and the fact that it is an important predator in the Patagonian shelf waters (Laptikhovsky & Fetisov, ), many studies have examined its diet composition (Angelescu & Cousseau, ; Angelescu, Gneri, & Nani, ; Angelescu & Prenski, ; Belleggia, Figueroa, Irusta, & Bremec, ; Cordo, ; Ocampo Reinaldo, González, & Romero, ; Ruiz & Fondacaro, ; Sánchez, ; Sánchez & García De La Rosa, ; Sánchez & Prenski, ; Temperoni, Viñas, & Buratti, ). Although the feeding habits of Argentine hake have been studied in detail, there is no work analysing long‐term variations in diet composition.…”

Section: Introductionmentioning

confidence: 99%

Adaptation of diet in a changed environment: Increased consumption of lobster krill Munida gregaria (Fabricius, 1793) by Argentine hake

2017

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A well‐replicated decadal‐term (2005–2014) stomach content data set was analysed in order to infer inter‐annual fluctuations in the diet of the Argentine hake, Merluccius hubbsi, an opportunistic predator in the San Jorge Gulf (SJG) ecosystem in the Southwest Atlantic. Ten research cruises were carried out each year during January from 2005 to 2014. A total of 18,461 specimens of Me. hubbsi was analysed, of which 6,777 (36.71%) contained food in their stomachs. The diet of Me. hubbsi changed markedly from 2011 onwards, with much greater consumption of the lobster krill Munida gregaria compared to the years before 2011. The frequency of occurrence (%F) of Mu. gregaria in the stomach contents of Argentine hake increased from the year 2009 onwards, most noticeably since 2011, and mostly over the southern region of the SJG. The main predators of Mu. gregaria in the SJG are two species of teleost fish (pink cusk eel, Genypterus blacodes, Argentine seabass, Acanthistius brasilianus) and three Rajidae skates (Zearaja chilensis, Psammobatis spp. and Sympterygia bonapartii), which exhibited decreased catches in the years analysed. The increased consumption of Mu. gregaria by Me. hubbsi, coupled with decreased trends in abundance of the main predators of the lobster krill during the last decade, indicate that top‐down trophic dynamic control occurs in the SJG ecosystem.

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“…Several studies have investigated the economic importance, biological, ecological and fishing aspects of M. hubbsi. The most recent contributions are on juvenile growth (BURATTI; SANTOS, 2010;LORENZO et al, 2011), foraging strategies (TEMPERONI et al, 2013;BELLEGGIA et al, 2014), systematics (DÍAZ-DE-ASTARLOA et al, 2011) and differences in reproductive aspects and larval development (BETTI et al, 2014;MACCHI et al, 2016). The majority of them came from the Argentina and none is related to use of otolith morphology and morphometry to ascertain geographic variation of the species.…”

mentioning

confidence: 99%

“…The current methods for this include the analysis of the structure of rings (BROPHY, 2014;ROMO-CURIEL et al, 2015;GOERTLER et al, 2016); elemental composition (CAMPANA et al, 2000;NIKLITSCHEK et al, 2010;AVIGLIANO;VOLPEDO, 2016); and morphology and morphometry (LEGUÁ et al, 2013;SADIGHZADEH et al, 2014). The results of analyses of ring formation and growth (BURATTI;SANTOS, 2010;LORENZO et al, 2011;SCHWINGEL, 2015), linear morphometry and chemistry analyses suggested that the sagittae of M. hubbsi may be used to ascertain variations among stocks.…”

mentioning

confidence: 99%

Otoliths sagittae of Merluccius hubbsi: an efficient tool for the differentiation of stocks in the Southwestern Atlantic

et al. 2017

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Food and feeding of Argentine hake (Merluccius hubbsi) larvae in the Patagonian nursery ground

Cited by 32 publications

References 41 publications

Effect of nursery ground variability on condition of age 0+ year Merluccius hubbsi

Effect of nursery ground variability on condition of age 0+ year Merluccius hubbsi

Adaptation of diet in a changed environment: Increased consumption of lobster krill Munida gregaria (Fabricius, 1793) by Argentine hake

Otoliths sagittae of Merluccius hubbsi: an efficient tool for the differentiation of stocks in the Southwestern Atlantic

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