Otolith elemental evidence for spatial structuring in a temperate reef fish population

Beer, Nicola A.; Wing, Stephen R.; Swearer, Stephen E.

doi:10.3354/meps09407

Cited by 17 publications

(15 citation statements)

References 45 publications

(41 reference statements)

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“…Tagging studies have demonstrated low rates of unidirectional adult migrations from the outer coast into the inner fjord habitats, and a high degree of site fidelity (Carbines & McKenzie 2004). Evidence from trace elemental signatures within the otoliths of these fish corroborate these findings and suggest that subpopulations in the inner fjords are distinct with a high degree of site fidelity (Beer et al 2011). Due to the likelihood that chemoautotrophic production plays an important role in food web dynamics in these habitats, we investigated differences in use of basal organic matter sources and trophic position among subpopulations of blue cod distributed among outer coastal and inner fjord habitats in multiple fjords.…”

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confidence: 66%

“…Evidence from genetic (Perrin et al 2004) and natural markers (Lawton et al 2010) demonstrates that many invertebrate and coastal fish populations display strong spatial structure among the basins and across the productivity gradients of Fiordland (Wing 2009, Beer et al 2011). In the case of blue cod Parapercis colias, there is evidence for source−sink structure of populations distributed between the wave-exposed outer coast kelp forest habitats and the quiescent basins of the inner fjords (Rodgers & Wing 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, in some inner basin fjordic environments, recycled production may provide a majority of the organic matter to benthic food webs (McLeod et al 2010b). In these habitats, chemoautotrophic production provides a basis for support of upper trophic level species and a mechanism for maintenance of subpopulations across strong productivity gradients.Evidence from genetic (Perrin et al 2004) and natural markers (Lawton et al 2010) demonstrates that many invertebrate and coastal fish populations display strong spatial structure among the basins and across the productivity gradients of Fiordland (Wing 2009, Beer et al 2011). In the case of blue cod Parapercis colias, there is evidence for source−sink structure of populations distributed between the wave-exposed outer coast kelp forest habitats and the quiescent basins of the inner fjords (Rodgers & Wing 2008).…”

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confidence: 99%

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Resource base of blue cod Parapercis colias subpopulations in marginal fjordic habitats is linked to chemoautotrophic production

Wing¹,

Beer²,

Jack³

2012

Mar. Ecol. Prog. Ser.

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Metapopulations are often distributed across habitat patches with distinct differences in nutritional resources. We investigate individual variability in diet among subpopulations of blue cod Parapercis colias across productivity gradients within Fiordland, New Zealand. δ 13 C and δ 15 N of basal organic matter, including phytoplankton, macroalgae, terrestrial detritus and the chemosymbiont-harbouring clam Solemya parkinsonii, were collected. P. colias from inner and outer fjord sites within 5 fjords were analysed for proportion of diet comprising S. parkinsonii, and δ 13 C and δ 15 N of muscle tissue. Relative abundance of photoautotrophic organic matter was quantified from surveys of chl a and abundance of common kelp Ecklonia radiata. Information on mussel beds was collected to characterise potential for benthic-pelagic coupling. A mass balance model using δ 13 C and δ 15N was used to estimate trophic level and proportion of organic matter from chemosynthesis for individual blue cod. Blue cod from the inner fjords had more variable use of organic matter originating from photoautotrophic versus chemoautotrophic sources than those from outer fjord regions. This was consistent with greater occurrence of S. parkinsonii in stomachs of blue cod from the inner fjords. Abundance of phytoplankton and occurrence of mussels statistically explained 87% of the variability in proportion of organic matter originating from chemosynthesis. These data provide an important example of variation in basal organic matter sources among subpopulations within a marine metapopulation. Our results demonstrate the importance of organic matter produced from chemosynthesis in coastal food webs providing a mechanism for maintenance of high trophic level consumers in marginal habitats. KEY WORDS: Chemoautotrophy · Food web · Fjord · Reef fish · Stable isotopes · Trophic level · MetapopulationResale or republication not permitted without written consent of the publisher Mar Ecol Prog Ser 466: 205-214, 2012 subpopulations, as indicated by diversity of basal organic matter sources, changes across environmental gradients.Metapopulation dynamics of many coastal invertebrates and fishes may be strongly influenced by habitat quality and the effects of the nutritional environment on local growth and reproductive output (e.g. Sanford & Menge 2007, Jack & Wing 2010. Though subpopulations can be linked by larval dispersal over relatively large distances, site fidelity by adult reef fish may result in large differences in diet, growth and egg production among habitats (Gust et al. 2002, Lawton et al. 2010. Accordingly, at this local population level, the food webs supporting generalist reef fish may reflect the relative availability of basal organic matter sources (Vander Zanden & Vadeboncoeur 2002, McLeod et al. 2010a. As resources become rare, or habitat quality changes, variability in diet among individuals may increase (Fry et al. 1999, Vander Zanden et al. 2010. In this case, specialisation or diversification in resource use at the ind...

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confidence: 66%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Resource base of blue cod Parapercis colias subpopulations in marginal fjordic habitats is linked to chemoautotrophic production

Wing¹,

Beer²,

Jack³

2012

Mar. Ecol. Prog. Ser.

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“…Both blue cod (Beer et al 2011) and rock lobster populations show evidence for spatial structure and high adult site fidelity among fjords. Both species are also important high trophic level consumers in the coastal food web whose subpopulations are subject to spatial variation in food web structure along the primary environmental gradients in the system (Rodgers andWing 2008, Jack andWing 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The resultant spatial diversity in basal organic matter sources fuelling food webs can be directly linked to subpopulation structure, growth and fecundity of benthic invertebrates , Jack et al 2009, Wing 2009 and reef fish (Rodgers and Wing 2008, Lawton et al 2010, McLeod et al 2010a). The insular nature of the environmentally defined regions among fjords and predominance of estuarine circulation has a strong influence on both adult and larval connectivity patterns across the landscape (Perrin et al 2004, Beer et al 2011 (UNESCO 1990). In response to a regionally declining stock of red rock lobsters (Jasus edwardsii ), two no-take marine reserves, Te Awaatu Channel (The Gut, Doubtful Sound) and Piopiotahi (Milford Sound) were proposed by the New Zealand Federation of Commercial Fishermen and formally established in 1993.…”

Section: Introductionmentioning

confidence: 99%

A safety network against regional population collapse: mature subpopulations in refuges distributed across the landscape

Jack

Wing

2013

Ecosphere

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Citation: Jack, L., and S. R. Wing. 2013. A safety network against regional population collapse: mature subpopulations in refuges distributed across the landscape. Ecosphere 4(5):57. http://dx.doi.org/10.1890/ES12-00221.1Abstract. Theory suggests that marine reserve networks can maintain wide geographical distributions of exploited fish and invertebrates. Since 2005, ten regions in southwest New Zealand have been designated no-take marine reserves nested within eleven commercial fishing exclusion zones. We observed increases in abundance of rock lobster (Jasus edwardsii ) and blue cod (Parapercis colias) from 2002-2010 within some marine reserves, but not in the other management zones. Mature size distributions of rock lobsters were only observed within protected areas. Model based inference ranked environmental descriptors versus area under protection in explaining abundance and changes in abundance observed within marine reserves and indicated that J. edwardsii became most abundant in larger marine reserves, but only under specific environmental conditions. P. colias became most abundant in large marine reserves, particularly those with larger buffers against commercial fishing. Analysis of population changes for both species across Fiordland since implementation of the reserve network (2006)(2007)(2008)(2009)(2010) indicated that marine reserves resulted in either increases in, or maintenance of abundance in the face of regional declines. We highlight the potential effectiveness of networks of marine reserves in maintaining subpopulations with high abundance and mature size structure across large geographical areas, particularly if key criteria are incorporated.

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Life history traits vary between geographically distinct populations in a protogynous hermaphrodite

Kolodzey

Wing

2022

Ecosphere

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Sequential hermaphroditic species, such as blue cod (Parapercis colias), are particularly vulnerable to selective harvesting as it can directly influence the sex ratio, timing of sex change, and consequentially recruitment success.We analyzed the population structure, at which males dominate the populations, and modeled fecundity of blue cod from the Marlborough Sounds in the north of New Zealand's South Island, and compared these results with previously collected data from a blue cod population in Fiordland on the southwest coast of the South Island. In addition to the geographical difference, there were differences

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Otolith elemental evidence for spatial structuring in a temperate reef fish population

Cited by 17 publications

References 45 publications

Resource base of blue cod Parapercis colias subpopulations in marginal fjordic habitats is linked to chemoautotrophic production

Resource base of blue cod Parapercis colias subpopulations in marginal fjordic habitats is linked to chemoautotrophic production

A safety network against regional population collapse: mature subpopulations in refuges distributed across the landscape

Life history traits vary between geographically distinct populations in a protogynous hermaphrodite

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