Spatio‐temporal distribution of fish in the Kakanui River estuary, South Island, New Zealand

Jellyman, D. J.; Glova, G. J.; Sagar, Paul M.; Sykes, J. R. E.

doi:10.1080/00288330.1997.9516748

Cited by 24 publications

(21 citation statements)

References 17 publications

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“…Thus spawning may occur over a 3-month season. A spring-summer spawning season assumed by Eldon & Kelly (1985) and Jellyman et al (1997) would explain the loss of weight observed in the present study during this period.…”

Section: Discussionsupporting

confidence: 55%

“…However, an apparent preference for upper reaches of estuaries means that individual populations could be vulnerable to habitat modifications in these areas. It was suggested by Jellyman et al (1997) that the high densities in the Kakanui estuary were related to the availability of suitable cover like water depth, tree roots and associated debris. If correct, loss of riparian and/or depth in such reaches, could seriously disadvantage giant bullies.…”

Section: Discussionmentioning

confidence: 99%

“…A description of the estuary is given in Jellyman et al (1997). Fish were captured mainly in unbaited fyke nets (25 mm mesh) set overnight in four reaches of the Kakanui estuary (see Jellyman et al 1997 for further details). Giant bullies were measured (to 1 mm) and a proportion weighed (to ±1 g).…”

Section: Methodsmentioning

confidence: 99%

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Age, growth, and movements of giant bullies(Gobiomorphus gobioides)in the Kakanui River estuary, South Island, New Zealand

Jellyman¹,

Sagar

Glova

et al. 2000

New Zealand Journal of Marine and Freshwater Research

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The giant bully, Gobiomorphus gobioides (Valenciennes), is widespread throughout New Zealand, but remains one of our least known freshwater fish. During a study of seasonal fish abundance and movements in the Kakanui River estuary, South Island, New Zealand, giant bullies captured mainly in fyke nets were measured and tagged. Growth rates and movements were calculated for the 19 fish recaptured. Growth rates corresponded with mean growth rates back-calculated from otolithsscales were considered to overestimate age, and no age classes were evident from length-frequency distributions. Seasonal changes in condition were associated with spawning during spring-summer.

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Section: Discussionsupporting

confidence: 55%

Section: Discussionmentioning

confidence: 99%

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Age, growth, and movements of giant bullies(Gobiomorphus gobioides)in the Kakanui River estuary, South Island, New Zealand

Jellyman¹,

Sagar

Glova

et al. 2000

New Zealand Journal of Marine and Freshwater Research

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“…It has been suggested that these streams contain little suitable habitat for their development, and that the fish either suffer substantial mortality, or emigrate and move into estuarine or coastal habitats (Bonnett et al 1996). Sub-adult shortfins are known to occur in estuaries and occupy areas in them further down stream than longfins (Jellyman et al 1997). Although such movement by shortfins may be largely the result of their search for slow-flowing and standing waters, it may also be due partly to interaction with longfins.…”

Section: Discussionmentioning

confidence: 99%

Factors associated with the distribution and habitat of eels (Anguillaspp.) in three New Zealand lowland streams

Glova

Jellyman

Bonnett

1998

New Zealand Journal of Marine and Freshwater Research

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The distributions of shortfinned eels (Anguilla australis) and longfinned eels (A. dieffenbachii) of all sizes in three New Zealand coastal streams were investigated during summer by sampling stratified, randomly chosen pool, run, and riffle sites from tidal to upper reaches. In all streams, both species were widespread, although a greater proportion of the total population of shortfinned eels was present in the lower reaches and small eels (<300 mm total length (TL)) had advanced further up stream than longfins in two of the streams. The biomass (g m -2 ) of longfinned eels <300 mm TL was greatest in riffles, whereas that of comparable-sized shortfinned eels was evenly distributed across habitat types in all streams; in contrast, eels 300 mm TL of both species showed no consistent pattern of habitat use between streams. Multiple regression analysis of species biomass (g m -2 ) for four size groups (<100; 100-199; 200-299; 300 mm TL) against 16 habitat variables, indicated that the distribution of shortfinned eels <300 mm TL was most closely associated with distance from the ocean, Received 12 September 1997; accepted 24 December 1997 whereas that of longfinned eels of the same size group was most closely associated with water velocity and substrate. Medium-large eels ( 300 mm TL) of both species were strongly associated with cover, with longfinned eels using a greater variety (macrophytes, banks, in-stream debris, shade) than shortfinned eels (primarily riparian cover). Overall, our findings suggest that the longfinned eel is a more generalist species, living in a broad range of habitats, whereas the shortfinned eel is more specialised, as is reflected in differences in their distributions and habitat associations. M97051

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“…Dans les zones saumâtres, les engins de capture les plus utilisés sont le verveux ou le chalut (COSTA, 1986 ;POTTER et al, 1986 ;MAES et al, 1997). D'autres auteurs ont utilisé des sennes de plage (LE MAO, 1986 ;CLARK et al, 1996 ;JELLYMAN et al, 1997). Mais ces différentes méthodes ne permettent pas d'estimer les densités des différentes populations.…”

Section: Peuplement Généralunclassified

Composition Du Peuplement Piscicole d'UN Petit Estuaire Anthropisé (Le Couesnon, France).

Laffaille¹,

Thieulle²,

Feunteun³

et al. 2001

Bull. Fr. Pêche Piscic.

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RÉSUMÉDans un petit estuaire du nord de la Bretagne (France), l'ichtyofaune a été échantillonnée lors de chaque saison d'une année sur six stations selon une répartition amont-aval. 28 espèces ont ainsi été capturées à l'aide de deux engins de pêche, une senne de plage couplée à un tramail. Selon les indices d'abondance numériques et pondéraux, trois zones peuvent être identifiées. Une zone estuarienne marine en aval qui est composée essentiellement d'espèces marines et résidentes de la baie adjacente. Le peuplement est dominé par les gobies buhottes et par les juvéniles de plies, de bars et de mulets. La diversité piscicole et les indices d'abondance sont plus élevés que dans les autres zones. Les stations les plus en amont correspondent à la zone estuarienne dulçaquicole qui est presque exclusivement composée d'espèces dulcicoles. Ce peuplement est dominé par les brèmes, les gardons et les chevaines. Mais les indices d'abondance sont les plus faibles à cause de la banalisation et de la chenalisation des berges. La troisième zone correspond à la zone estuarienne intermédiaire. La présence d'espèces d'origine marine et littorale y est limitée par un barrage estuarien. Cet aménagement hydraulique, situé très en aval, réduit ainsi la fonction de nurserie de cet estuaire vis à vis des espèces marines. La répartition spatiale du peuplement piscicole est donc le résultat d'un facteur abiotique (la salinité) et de l'action anthropique (le barrage et la perte des habitats). Mots-clés COMPOSITION OF FISH COMMUNITY IN SMALL ANTHROPIC ESTUARY (THE « COUESNON », FRANCE). ABSTRACTIn a small estuary of the North Brittany (France), fish communities were sampled during one year at each season on six stations according to a downstream gradient. 28 species were caught by a beach seine coupled with a trammel net. According to numeric and biomass abundance index, three zones were identified. A marine estuarine zone which was composed essentially of marine and resident species of the neighbouring bay. This community was dominated by sand gobies Pomatoschistus minutus and by young flounders, sea bass and mullets. Species richness and abundance index were higher than in the other zones of this estuary. Most upstream station, corresponding to the freshwater estuarine zone, were characterised by the almost exclusive dominance of freshwater species. This community was dominated by breams, roaches and chubs. But abundance index were lowest because of disturbed habitat due to embanking. Presence of marine and littoral species in the intermediate estuarine zone is limited by the presence of a estuarine dam, located at the outlet of the river, which reduces, nursery function of this estuary. Also, spatial distribution of the fish communities is the result of a abiotic factor (salinity) and of anthropic action (the dam and habitat loss).

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Spatio‐temporal distribution of fish in the Kakanui River estuary, South Island, New Zealand

Cited by 24 publications

References 17 publications

Age, growth, and movements of giant bullies(Gobiomorphus gobioides)in the Kakanui River estuary, South Island, New Zealand

Age, growth, and movements of giant bullies(Gobiomorphus gobioides)in the Kakanui River estuary, South Island, New Zealand

Factors associated with the distribution and habitat of eels (Anguillaspp.) in three New Zealand lowland streams

Composition Du Peuplement Piscicole d'UN Petit Estuaire Anthropisé (Le Couesnon, France).

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