A Comparison of Gill Netting and Electrofishing as Sampling Techniques for White Bass in Missouri's Large Reservoirs

Colvin, Michael A.

doi:10.1577/1548-8675(2002)022<0690:acogna>2.0.co;2

Cited by 13 publications

(19 citation statements)

References 12 publications

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“…Gill nets are widely used to assess the fishery resources in many aquatic ecosystems such as lakes, impoundments, bay and sea (Minns & Hurley 1988;Murphy & Willis 1996;Colvin 2002). Gill nets have a detrimental impact on capturing some of the species; however, for the assessment of fisheries diversity, it is a more cost-effective technique compared to other expensive and labour-intensive procedures (David & William 2005).…”

Section: Discussionmentioning

confidence: 99%

Status of some fishery resources in a tropical mangrove estuary of Sarawak, Malaysia

Hoque

Kamal

Idris

et al. 2015

Marine Biology Research

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This study was carried out to assess the fishery resources of the Sibuti River estuary, Sarawak, Malaysia. Data were collected from the study area for a period of one year in different seasons. The estuary is relatively species-rich and a total of 4675 individuals of 32 families from 60 species of fish (55), crab (four) and shrimp (one) were collected. Coilia dussumieri was the dominant species (22.63%) followed by Nemapteryx caelata (11.85%), Otolithes ruber (7.85%) and Ilisha elongata (5.80%). Marked seasonal variations were found among most of the hydrobiological factors; however, seasonal variations were not significant for the diversity indices such as Shannon-Wiener, Margalef and Evenness. The number of fish taxa caught in different mesh size gill nets was 1 inch (42 species) > 2 inch (36 species) > 4 inch (25 species), suggesting that smaller mesh nets are more suitable for assessing the diversity of fishery resources. SIMPER analysis showed that Coilia dussumieri was the most abundant species in the dry (10.3%) and intermediate (8.1%) seasons, whereas N. caelata was most abundant in the wet season (7.1%). Significant differences (ANOSIM and nMDS) were observed in the species community structure between dry-intermediate and dry-wet seasons; however, species compositions were not significantly different between intermediate and wet seasons. Canonical correspondence analysis (CCA) showed that most of the species assemblages were positively correlated with turbidity and chlorophyll a, followed by phosphate, nitrate and zooplankton density. The findings suggest that the Sibuti mangrove estuary is productive in terms of diversified fishery resources, which are influenced by the hydrobiological factors.

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Section: Discussionmentioning

confidence: 99%

Status of some fishery resources in a tropical mangrove estuary of Sarawak, Malaysia

Hoque

Kamal

Idris

et al. 2015

Marine Biology Research

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“…Fisheries managers and researchers require unbiased estimates of fish population characteristics. Sampling techniques should provide a measure of relative abundance, and the fish captured should accurately reflect the size structure of the fish population (Guy et al., 1996; Colvin, 2002; Paukert, 2004). Sampling must also be standardized to obtain precise, unbiased estimates of fish population size and age structure and relative abundance (Allen et al., 1999).…”

Section: Introductionmentioning

confidence: 99%

An initial assessment of sampling procedures for juvenile pallid sturgeon in the Missouri River downstream of Fort Randall Dam, South Dakota and Nebraska

et al. 2007

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Summary We compared the effectiveness of passive gill nets, hoop nets, set lines, and drifted trammel nets, towed beam trawls and otter trawls to develop criteria to best determine the mean catch per unit effort (CPUE) for juvenile pallid sturgeon (Scaphirhynchus albus) based on selectivity and seasonal efficiency in various habitats of the Missouri River downstream of Fort Randall Dam, South Dakota. Sampling occurred from April to November in 2003 and 2004 and from March to November in 2005. We captured 29 juvenile pallid sturgeon in a total of 498 overnight gill net sets, 55 in 870 drifted trammel nets, 19 on 1683 set lines, and six in 166 otter trawl tows. No pallid sturgeon were captured in 515 beam trawl tows or 520 overnight hoop net sets. Seasonal trends in mean CPUE were found and the relative precision was the greatest in October and November for gill nets, in August for trammel nets, in April for set lines, and in October for otter trawls. A higher proportion of pallid sturgeon captures for gill nets were in the inside bend macrohabitat generally associated with lower water velocities, trammel nets over sand substrate and in the outside bend macrohabitat typically associated with higher water velocities and greater depths, set lines in lower water velocities, and otter trawls in depths >2.5 m and over sand substrate. Although we found trends among seasons and habitats for gill nets, trammel nets, set lines, and otter trawls, the catch rates were low and annual point estimates of relative abundance are not adequate to detect changes in relative abundance of juvenile pallid sturgeon in this reach of the Missouri River. Independently, gill nets, trammel nets, and otter trawls likely captured the size structure of the population of pallid sturgeon in the Missouri River downstream of Fort Randall Dam. Based on our results, a standardized protocol can now be established to systematically monitor juvenile pallid sturgeon, an essential element for determining responses to recovery efforts in the Missouri River.

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“…Palmetto bass were sampled in mid-October, 2006À2011, with experimental monofilament gill nets set on the bottom in water depths of 3À8 m on flats and points (Colvin 2002). Gill nets were set either parallel or perpendicular to shore depending on topography (i.e., steep slopes were avoided).…”

Section: Fish Collectionsmentioning

confidence: 99%

Responses of gizzard shad and white crappie to introductions of palmetto bass

Michaletz

2014

Journal of Freshwater Ecology

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Palmetto bass (female striped bass Morone saxatilis £ male white bass Morone chrysops) were stocked into Long Branch Lake, Missouri, USA in an effort to restructure the gizzard shad Dorosoma cepedianum population via predation. The goal of this restructuring was to provide more suitable-size prey for white crappie Pomoxis annularis, thereby improving growth of this important sport fish. Secondarily, palmetto bass may prey on the abundant white crappie population which may reduce density-dependent effects on growth. Trends in abundance and mean total length (TL) at age of white crappie and gizzard shad were examined over an eight-year period which spanned years before, during, and after stocking of palmetto bass. Also, trends in water quality and zooplankton variables, which may influence gizzard shad demographics, were examined during this period. Following stockings of palmetto bass, mean TL at age of adults and abundance of age-0 gizzard shad increased. Water quality variables and zooplankton biomass that may have influenced gizzard shad showed no temporal trends except for turbidity which increased over time. Despite the changes in the gizzard shad population, mean TL at age of white crappie did not improve and their abundance did not decline. Age-0 gizzard shad still quickly outgrew their vulnerability to most white crappie. It may be necessary to incorporate other management strategies in addition to stocking palmetto bass to improve growth of white crappie in this reservoir.

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A Comparison of Gill Netting and Electrofishing as Sampling Techniques for White Bass in Missouri's Large Reservoirs

Cited by 13 publications

References 12 publications

Status of some fishery resources in a tropical mangrove estuary of Sarawak, Malaysia

Status of some fishery resources in a tropical mangrove estuary of Sarawak, Malaysia

An initial assessment of sampling procedures for juvenile pallid sturgeon in the Missouri River downstream of Fort Randall Dam, South Dakota and Nebraska

Responses of gizzard shad and white crappie to introductions of palmetto bass

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