Larval fish feeding ecology, growth and mortality from two basins with contrasting environmental conditions of an inner sea of northern Patagonia, Chile

Landaeta, Mauricio F.; Bustos, Carlos; Contreras, Jorge E.; Salas-Berrios, Franco; Palacios-Fuentes, Pámela; Alvarado-Niño, Mónica; Letelier, Jaime; Balbontín, Fernando

doi:10.1016/j.marenvres.2015.03.003

Cited by 28 publications

(15 citation statements)

References 35 publications

(46 reference statements)

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“…Region-specific larger size-at-age has been linked to increased foraging success in a closely related species, Maurolicus parvipinnis, in Chilean waters (Landaeta et al 2015). In our case, this can indicate that prey availability was similar for the younger larvae, but a possible decrease in food supply may have occurred for the first cohort as they grew older and switched to other larger prey items (Landaeta et al 2011).…”

Section: Biological Explanations For Differential Cohort Mortalitymentioning

confidence: 59%

“…Diet of first feeding Maurolicus larvae has elsewhere been shown to be dominated by copepod eggs and nauplii (Landaeta et al 2011(Landaeta et al , 2015. In the fjords of western Norway, advective processes may be more important than local population dynamics in determining available zooplankton (mainly copepod) biomass (Aksnes et al 1989), and in the nearby Masfjorden the biomass has varied both interannually and on shorter time scales by more than a factor of 10 (Giske et al 1991).…”

Section: Impact Of Hatch Date and Survival On Spawning Strategymentioning

confidence: 99%

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Impact of hatch date on early life growth and survival of Mueller’s pearlside (Maurolicus muelleri) larvae and life-history consequences

Folkvord

Gundersen

Albretsen

et al. 2016

Can. J. Fish. Aquat. Sci.

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Growth and survival of Maurolicus muelleri larvae in Herdlefjorden, Norway, were investigated by daily otolith increment analysis. While high egg densities were generally observed throughout the spawning season, three cohorts each with a narrow window of hatching dates were identified. The first of these cohorts was characterized by low growth and poor morphometric condition and disappeared from the fjord during autumn. High-resolution drift modeling indicated that Herdlefjorden had a net export of larvae and negligible import in the period cohort 1 disappeared. Yet, the advective loss rate of larvae was not considered high enough to explain the near complete disappearance of the first cohort. An otolith-based growth chronology indicated that growth conditions in Herdlefjorden improved noticeably around mid-September and remained favorable the following month. The analysis of daily otolith increments could thus be used to document within-season variability in larval growth and survival. The low and variable survival due to short-term fluctuations in environmental conditions indicate that multiple batch spawning is an adequately evolved life-history strategy for marine planktivorous fish such as M. muelleri.Résumé : La croissance et la survie des larves de Maurolicus muelleri dans le Herdlefjorden (Norvège) ont été étudiées par l'analyse des incréments quotidiens d'otolithes. Si de fortes densités d'oeufs ont été généralement observées durant toute la saison de frai, trois cohortes ont néanmoins été identifiées, chacune présentant sa propre fourchette restreinte de dates d'éclosion. La première cohorte était caractérisée par une faible croissance et un faible embonpoint morphométrique et a disparue du fjord durant l'automne. La modélisation à haute résolution de la dérive indique que le Herdlefjorden présentait une exportation nette de larves et une importation négligeable dans la période durant laquelle la première cohorte a disparu. Le taux de perte de larves par advection n'est toutefois pas jugé assez élevé pour expliquer la disparition presque complète de la première cohorte. Une chronologie de la croissance reposant sur les otolithes indique que les conditions de croissance dans le Herdlefjorden se sont améliorées de manière marquée vers la mi-septembre et sont demeurées favorables le mois suivant. L'analyse des incréments quotidiens d'otolithes pourrait donc être utilisée pour documenter la variabilité au cours d'une même saison de la croissance et de la survie des larves. Une survie faible et variable causée par des fluctuations de courte durée des conditions ambiantes indique que frayer en plusieurs épisodes constitue une bonne stratégie d'évolution du cycle biologique pour les poissons marins planctonivores comme M. muelleri. [Traduit par la Rédaction]

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Section: Biological Explanations For Differential Cohort Mortalitymentioning

confidence: 59%

Section: Impact Of Hatch Date and Survival On Spawning Strategymentioning

confidence: 99%

Impact of hatch date on early life growth and survival of Mueller’s pearlside (Maurolicus muelleri) larvae and life-history consequences

Folkvord

Gundersen

Albretsen

et al. 2016

Can. J. Fish. Aquat. Sci.

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“…Similarly, changes to larger prey size during early ontogeny have been observed in a large majority of marine fishes, such as cod Gadus morhua (Rowlands et al 2008, Swalethorp et al 2014, anchoveta Engraulis ringens (Llanos-Rivera et al 2004, Yañez-Rubio et al 2011 and rockfish Sebastes oculatus (Landaeta et al 2015). Optimal foraging theory postulates that predators maximize the ratio between the benefits gained and the costs incurred in obtaining prey.…”

Section: Discussionmentioning

confidence: 95%

Feeding habits and dietary overlap during the larval development of two sandperches (Pisces: Pinguipedidae)

Vera‐Duarte

Landaeta

2017

Sci. Mar.

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Summary:Two species of sandperch (Pinguipedidae: Perciformes), Prolatilus jugularis and Pinguipes chilensis, inhabit the coastal waters of the South Pacific. Both species have pelagic larvae with similar morphology, but their diet preferences are unknown. Diet composition, feeding success, trophic niche breadth and dietary overlap were described during larval stages for both species. In the austral spring, larval P. jugularis (3.83-10.80 mm standard length [SL]) and P. chilensis (3.49-7.71 mm SL) during their first month of life had a high feeding incidence (>70%) and fed mostly on copepod nauplii (>80% IRI), Rhincalanus nasutus metanauplii and Paracalanus indicus copepodites. The number of prey ingested was low (mean: 4-5 prey per gut) and independent of larval size; total prey volume and maximum prey width increased as larvae grew. Mouth opening and ingested prey were greater in larval P. jugularis than in P. chilensis, leading to significant differences in prey composition among larval species, in terms of prey number and volume. Pearre's trophic niche breadth was narrow for both species (0.159±0.07 for P. jugularis; 0.156±0.03 for P. chilensis) and independent of larval size. Dietary overlap was high inter-and intra-species in larvae with a mouth gape <900 μm. These results suggest the relative importance of both larval species as primary consumers of the pelagic web in nearshore environments of rocky temperate areas.Keywords: Prolatilus jugularis; Pinguipes chilensis; sandperch, feeding; resource partitioning; Chile.Hábitos alimentarios y superposición de la dieta durante el desarrollo larval de dos blanquillos (Pisces: Pinguipedidae) Resumen: Existen dos especies de blanquillo (Pinguipedidae: Perciformes), Prolatilus jugularis y Pinguipes chilensis que habitan las aguas costeras del Pacífico Sur. Ambas especies tienen larvas pelágicas con morfología similar, pero se desconocen sus preferencias de la dieta. Se describen la composición de la dieta, amplitud del nicho trófico y superposición trófica durante los estados larvales de ambas especies. En primavera, las larvas de P. jugularis (3.83-10.80 mm LE) y P. chilensis (3.49-7.71 mm LE) durante su primer mes de vida tienen alta incidencia alimentaria (>70%) y se alimentan principalmente de nauplii de copépodos (>80%IRI), metanauplii de Rhincalanus nasutus y copepoditos de Paracalanus indicus. El número de presas ingeridas fue bajo (media: 4-5 presas por estómago) e independiente del tamaño larval; el volumen total de presas y el ancho máximo de las presas se incrementó a medida que crecían las larvas de ambas especies. El largo de la mandíbula y el tamaño de las presas fue más grande en larvas de P. jugularis comparado con las de P. chilensis. Esto generó diferencias significativas en la composición de las presas entre especies, en términos de número y volumen de las presas ingeridas. La amplitud del nicho trófico de Pearre fue bajo para ambas especies (0.159±0.07 para P. jugularis; 0.156±0.03 para P. chilensis) e independiente del tamaño larval. La superpos...

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“…In marine ecosystems, Landaeta et al. () documented faster growth of larval Pearlsides Maurolicus parvipinnis in warmer, more productive areas of the South Pacific, and Meekan et al. () found that temperature better explained variation in growth of Neon Damselfish Pomacentrus coelestis than chlorophyll or zooplankton abundance on an Australian reef.…”

mentioning

confidence: 99%

“…Across a diversity of ecosystems, temperature, densities of zooplankton prey, and densities of larval competitors have been identified as important variables to explain larval fish growth rates. In marine ecosystems, Landaeta et al (2015) documented faster growth of larval Pearlsides Maurolicus parvipinnis in warmer, more productive areas of the South Pacific, and Meekan et al (2003) found that temperature better explained variation in growth of Neon Damselfish Pomacentrus coelestis than chlorophyll or zooplankton abundance on an Australian reef. Furthermore, Pepin (1991) argued that temperature regulates the vital rates of all early life stages of marine fishes.…”

mentioning

confidence: 99%

Densities, Diets, and Growth Rates of Larval Alewife and Bloater in a Changing Lake Michigan Ecosystem

et al. 2019

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Variability in abiotic and biotic factors during larval stages has profound impacts on fish recruitment. In Lake Michigan, where the composition of lower trophic levels has undergone considerable changes in the past decade, managers are concerned that fish recruitment could be negatively affected. We hypothesized that spatial variation in Lake Michigan larval fish density and growth can be explained by various environmental predictor variables. In July 2015, we sampled larval fish and zooplankton at 24 sites (distributed among eight transects) around Lake Michigan. We measured larval fish densities and estimated growth rates and diets of the two most abundant species: the Alewife Alosa pseudoharengus and Bloater Coregonus hoyi (prey fish that represented 89% and 4% of the total catch, respectively). Larval Alewife densities at a given site ranged from 0 to 42.57 larvae/100 m3, but no explanatory variables explained the variation. Alewife mean growth rate equaled 0.50 mm/d, and fish age and zooplankton density best explained growth variation across sites. Larval Bloater densities ranged from 0 to 1.16 larvae/100 m3, and mean growth rate was 0.21 mm/d. Across all sites, 67% of larval Alewife stomachs were empty, whereas only 16% of Bloater stomachs were empty. Larval fish growth rates observed in our study were at least 40% slower than those reported in previous decades for both Alewife and Bloater. Worsening prey environment for pelagic larvae, such as Alewife and Bloater, during the era of abundant dreissenid mussels could reduce the probability of strong year‐classes, which in turn may affect growth and survival of recreationally important salmonine predators.

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Larval fish feeding ecology, growth and mortality from two basins with contrasting environmental conditions of an inner sea of northern Patagonia, Chile

Cited by 28 publications

References 35 publications

Impact of hatch date on early life growth and survival of Mueller’s pearlside (Maurolicus muelleri) larvae and life-history consequences

Impact of hatch date on early life growth and survival of Mueller’s pearlside (Maurolicus muelleri) larvae and life-history consequences

Feeding habits and dietary overlap during the larval development of two sandperches (Pisces: Pinguipedidae)

Densities, Diets, and Growth Rates of Larval Alewife and Bloater in a Changing Lake Michigan Ecosystem

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