Estimation of Fish Production Rates and Associated Variances

Newman, Raymond M.; Martin, Frank B.

doi:10.1139/f83-200

Cited by 61 publications

(54 citation statements)

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“…IGRM calculations were thus made for this single cohort. Confidence intervals were calculated for IGRM estimates by the methods of Newman and Martin (1983).…”

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confidence: 99%

Production of fishes in a subtropical blackwater ecosystem: The Okefenokee Swamp1

Freeman

1985

Limnology & Oceanography

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Secondary production by the three dominant fishes inhabiting an acidic macrophyte marsh in the Okefenokee Swamp was 171 kg wet wt ha−1 yr−1. Production was estimated by the instantaneous growth rate and size‐frequency methods. The size‐frequency method gave higher, presumably more accurate, estimates because it is not affected by nonsynchronous cohort development; also, densities of small, undersampled, individuals could be back‐calculated from densities in larger size classes. This estimated production exceeds many values reported for stream and river habitats. It is suggested that such blackwater dystrophic habitats are more productive than previously thought.

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“…IGRM calculations were thus made for this single cohort. Confidence intervals were calculated for IGRM estimates by the methods of Newman and Martin (1983).…”

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confidence: 99%

Production of fishes in a subtropical blackwater ecosystem: The Okefenokee Swamp1

Freeman

1985

Limnology & Oceanography

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“…is selection indicated? Statistical differences in annual production estimates were determined based on 95 percent confidence intervals (Newman & Martin 1983). Differences among mean macroinvertebrate densities and among mean prey number per fish stomach were inferred from approximate 95 percent confidence intervals (+ 2 SE).…”

Section: Methodsmentioning

confidence: 99%

Diet and annual production of two boreal river fishes following clearcut logging

Garman

Moring

1993

Environ Biol Fish

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SynopsisDiet and annual production of two cyprinid fishes in the Piscataquis River, Maine, were investigated before and after extensive deforestation of the surrounding watershed. Observed patterns were evaluated relative to post-logging changes in the benthic macroinvertebrate community, and to differences in ecomorphology between the two fishes. Prey selection was generally density-dependent for both predator species throughout the study, but significant exceptions to density-dependence were observed for several aquatic insect lifemode groups (e.g., swimmers, climbers, burrowers). This apparent preferencelavoidance for certain prey taxa by fish predators could be adequately explained by differential availability (vulnerability) among prey taxa. Compared to the year before logging, significant post-logging changes in diet composition and gut fullness were observed for both blacknose dace, Rhinichthys atratulus, and creek chub, Semotilus atromaculatus, concomitant with post-logging changes in the availability of benthic prey. Annual production of blacknose dace was significantly lower (52.7 vs. 37.7 kg ha-' y-') in the year following logging. In contrast, annual production of creek chub increased significantly after logging, from 8.6 to 17.4 kg ha-' y-l. Because post-logging changes in the physical environment were probably not sufficient to directly affect fish populations, we hypothesize that blacknose dace were morphologically constrained to feed on a declining aquatic prey resource, with a resultant decline in production. In contrast, the generalist creek chub switched to a non-aquatic prey resource (terrestrial arthropods) and no decline in production was observed for that species.

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“…Crayfish were also weighted with a dynamometer to the nearest 1 g and then put back to the pond, excepting in recaptures when a few of them were taken away for laboratory studies. Population numbers are calculated by capturelrecapture method (PETERSEN's method, with variance calculated as by NEWMAN and MARTIN, 1983).…”

Section: Deeper Zone (Not Evaluated)mentioning

confidence: 99%

Population structure and dynamics and habitat conditions of the native crayfish Austropotamobius pallipes in a pond : a case study in Basque Country (Northern Iberian Peninsula)

Rallo

García-Arberas

2000

Bull. Fr. Pêche Piscic.

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A natural and in appearance healthy population of the native crayfish Austropotamobius pallipes inhabiting a pond near Bilbao has been studied for three years, together with abiotic conditions of their habitat. The population occupies a littoral fringe (100 m length, 6 m width and approximately 1:5 m maximum depth), and has an estirnated average density of 1.67 specimen/m2. Despite the very high conductivity of the water (al1 values are above 1,750 pS/cm), total net production in the period 94-96 was 2,571.1 I 460.0 g (4.3 I 0.8 g/m2), with a productivity rate of 0.18 If: 0.04 measured as Production/Biomass (PIB) index. We think that population equilibrium with the carrying capacity of the pond ecosystem is reached.Key-words : crayfish, native species, population, pond, ecology, Spain. STRUCTURE DE POPULATION, DYNAMIQUES ET CONDITIONS D'HABITAT DE CÉCREVISSE AUTOCHTONE AUSTROPOTAMOBIUS PALLIPES DANS UNE MARE : UN CAS D'ÉTUDE AU PAYS BASQUE (NORD DE LA PÉNINSULE IBÉRIQUE).Une population naturelle apparemment saine d'écrevisses autochtones Austropotamobius pallipes peuplant une mare près de Bilbao a fait l'objet d'une étude sur trois ans, ainsi que s'intéressant aux conditions abiotiques de l'habitat. La population occupe une frange littorale (100 m de long, 6 m de large et environ 1,5 m maximum de profondeur), pour une densité évaluée à 1,67 individu/m2. En dépit de la très haute conductivité de l'eau (toutes les valeurs sont au-dessus de 1 750 pS/cm), la production totale nette durant la période 94-96 a été de 2 571,l I 460,O g (4,3 I 0,8 g/m2), avec un taux de productivité de 0,18 I 0,04 mesuré comme index Production/Biomasse (P/B). Nous pensons que l'équilibre de population que peut porter l'écosystème de la mare est atteint.

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Estimation of Fish Production Rates and Associated Variances

Cited by 61 publications

References 0 publications

Production of fishes in a subtropical blackwater ecosystem: The Okefenokee Swamp1

Production of fishes in a subtropical blackwater ecosystem: The Okefenokee Swamp1

Diet and annual production of two boreal river fishes following clearcut logging

Population structure and dynamics and habitat conditions of the native crayfish Austropotamobius pallipes in a pond : a case study in Basque Country (Northern Iberian Peninsula)

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