Length–weight relationships for common juvenile fishes and prey species in Hawaiian estuaries

Length–weight relationships (LWR) using 3876 individuals were determined for 39 species sampled in estuarine systems in the main Hawaiian Islands, including 33 species of fish from 21 families, five species of crustaceans (prey) from two families, and one mollusk species. For 17 species, LWRs were estimated for the first time. For another 14 species their LWRs were newly reported for Hawaiian waters, including seven introduced taxa that are well established in the islands' estuaries. The LWRs for all taxa include juvenile and sub‐adult size ranges commonly encountered in Hawaiian estuaries.     

Length‐weight relationships for small Midwestern US fishes

Herein, we provide length‐weight relationships for juvenile and smallbodied freshwater fishes of 20 species. Length‐weight parameters were estimated using data collected through four years of electrofishing surveys conducted in the rivers of Illinois, USA.     

Length–weight relationships for estuarine fishes in South Brazil

The present study reports the length‐weight relationships (LWRs) for 18 estuarine species sampled in Guaratuba Bay, South Brazil. For the majority of these 18 species the LWRs are known from the literature, but these estimates do not consider sexes separately which is done in this contribution. Different fishing gears were used in the samplings (cylindrical nets – 1 mm mesh size, bottom trawls – 250 mm mesh size in the arms and 12 mm mesh size in the bag, beach seine – 5 mm mesh size and hook and line fishery) between September 2007 to April 2014. The specimens were sexed and the LWRs were calculated for each sex separately. There were differences between sexes in growth type, showing the importance of sexing in these studies. We reported for the first time (based on FishBase) the LWRs for two species: Ctenogobius shufeldti and Hypleurochilus fissicornis.     

Length–weight relationships of six freshwater cyprinid fishes of Iran

Length–weight relationships were estimated for six cyprinid species of Iran. One of these species is endemic to Iran and the L–W parameters for three of the species are given for the first time.     

Length–weight relationships of fishes from Beimen lagoon,Taiwan

Length–weight relationship parameters (a and b) are presented for three fish species in the Beimen lagoon, Taiwan.     

Length–weight relationships of four freshwater fishes from the Geoje‐island in South Korea

The length–weight relationships (LWRs) for four freshwater fish species in catchment area of Geoje‐island, South Korea, were analyzed. Fish samples were collected quarterly using scoop‐nets (5 mm mesh size), casting nets (7 mm mesh size) from 2016 to 2017. LWRs data for three of these species have not yet been listed in FishBase.     

Length–weight relationships for five fishes in the Nmai Hka River,Myanmar

Length–weight relationships (LWRs) were investigated for five fish species occurring in the Nmai Hka River. Fish were collected monthly from five sites between January and May 2009, using five gill nets in the main river and electrofishing in tributaries. The results of LWRs for Bangana devdevi (Hora, 1936), Garra qiaojiensis Wu & Yao, 1977, Amblypharyngodon atkinsonii (Blyth, 1860), Schizothorax meridionalis (Tsao, 1964) and Mystus pulcher (Chaudhuri, 1911) provide basic data useful in fisheries science. All values of parameter b ranging from 2.89 for Bangana devdevi (Hora, 1936) and 3.47 for Garra qiaojiensis Wu & Yao, 1977(in all cases r² > .951).A new total length has been recorded for Garra qiaojiensis Wu & Yao, 1977 when comparing with records given in the international electronic databank FishBase (Froese & Pauly, 2017).     

Length–weight relationships of 21 fishes from the Xiangjiang River,China

This paper provides the length–weight relationships for 21 fish species belonging to four families and 19 genera from the Xiangjiang River, a tributary of the middle Yangtze River in China. Among them, the length–weight relationships for 14 fishes are first‐time reports for FishBase, and new maximum total lengths of 13 fishes are also reported.     

Length–weight relationships of fifteen endemic freshwater fishes in South Korea

This study estimated LWRs of fifteen Korean endemic fish species, which had no prior LWR data in fishbase . Fish samples were collected quarterly in the Korean Peninsula from 2010 to 2013 by cast net, gill nets and a kick net. Ranges of parameters a and b of the 15 species were from 0.00398 to 0.01141 and 0.96 to 3.32, respectively.     

Length‐weight relationships of fishes in the Mira basin,Colombia

This study estimated the a and b parameters of the length–weight relationships of 15 fishes from the Mira and Caunapí rivers, San Andrés de Tumaco, Nariño, Colombia. The specimens were captured during four samplings periods between 2015 and 2016 using a different a combination of fishing gillnets and electrofishing. The a values ranged from 0.0002 to 0.04 and b values ranged from 2.86 to 3.6. The data presented here are tentative estimates because the fish have been weighted and measured after fixation in formalin and ethanol, however, these data are references for weight‐length relationship for 15 species, the maximum weight for the same 15, and new maximum lengths for 3 species.     

Length–weight and length–length relationships for six commercial fishes from southern Korean waters

Presented are the relationships between total length and weight, and between total length and standard length for six commercial fishes collected twice a month from local fish markets in southern Korea between 2005–2006 for Acanthopagrus schlegelii (Bleeker, 1854), Hexagrammos agrammus (Temminck & Schlegel, 1843) and Hexagrammos otakii (Jordan & Starks, 1895), and monthly in 2004 for Dentex tumifrons (Temminck & Schlegel, 1843), Doederleinia berycoides (Hilgendorf, 1879) and Scomberomorus niphonius (Cuvier, 1832). The LWR for D. tumifrons is estimated for the first time, and a new maximum length was recorded for S. niphonius. All total length and weight relationships were significant (all r² > .953). The values of exponent b, estimated using simple linear least squares of log‐transformed weight and length data, ranged from 2.945 to 3.317.     

Length–weight relationships of fishes in Chi‐gu black‐spoonbill reserve area of Taiwan

Length–weight relationships are presented for five fish species from Chi‐gu in southern Taiwan. At present, two of these species have no estimates in FishBase.     

Length‐weight relationships of six fishes from the Anning River,China

This paper provides the length–weight relationships for six fish species collected from the Anning River, one of the biggest tributaries of the Yalong River in China. A total of 1096 specimens belonging to six fish species were analyzed. Among them, the length–weight relationships for 4 fish species are first‐time reports for FishBase and new maximum lengths of one fish species is also reported.     

Length–weight relationships of fishes from western Caribbean freshwater drainages of Venezuela

This report describes the length–weight relationships (LWRs) of 22 freshwater fish species from freshwater western Caribbean drainages in Venezuela. Fishes were collected in dry seasons between 2005 and 2007 with standardized electrofishing from coastal streams of Aroa, Yaracuy and Urama drainages. Results include the first LWR information for ten endemic and threatened species. Novel data on these freshwater fish faunas are important for monitoring their populations, as well as the condition of fluvial habitats to promote strategies for their conservation.     

Length–weight relationships of seven freshwater fishes from the JiangSu province,China

The length‐weight relationships (LWRs) are presented for seven freshwater fish species (Odontobutis potamophila, Protosalanx chinensis, Acheilognathus chankaensis, Megalobrama skolkovii, Pelteobagrus vachelli, Macropodus chinensis, Pseudobrama simoni) from JiangSu province in China. A total of 1340 specimens were sampled and measured between August 2012 and September 2013. No information regarding the LWRs of these species was available in FishBase.     

Length‐weight relationships of three fishes from the Nujiang River,China

The length‐weight relationships (LWR) for three fish species collected from the Nujiang River, China, were determined. Fishes were caught quarterly by drift gill net (stretched mesh size: 4 cm, depth: 2–4 m) and cast net (mesh size 1 cm; depth: 1–2 m) from May 2016 to July 2017. The values of parameter b in the LWR equations were estimated as 2.69 for Balitora nujiangensis Zhang & Zheng, 1983, 2.80 for Glyptothorax deqinensis Mo & Chu, 1986 and 2.94 for Pseudexostoma brachysoma Chu, 1979, respectively.     

Length–weight and length–length relationships for some Yangtze River fishes in Tian‐e‐zhou Oxbow,China

Length–weight and length–length relationships are reported for 32 fish species belonging to seven families and 26 genera from the Tian‐e‐zhou Oxbow in the middle reach of Yangtze River, near Shishou City, China. The weight (W) ‐ length (L) relationships were estimated using the logarithmic form of the equation W = aL^b. The exponent b varied from 2.60 to 3.65 (mean ± SE: 3.12 ± 0.25). The 14 weight–length relationships, 13 length–length relationships, and seven maximum lengths are presented to FishBase for the first time.     

Length‐weight relationships for nine fishes in the Nujiang River,Southwest of China

Length‐weight relationships (LWRs) were determined for nine fish species occurring in the Nujiang River. Fish were collected using gill nets, including two nets of 1.0 m depth (100 m long; mesh size 0.5 cm), two nets of 1.0 m depth (150 m long; mesh size 2.0 cm) and two nets reaching 1.5 m depth (mesh size 6.0 cm). Gill nets were set over night including different habitats (riffles and pools, vegetated and non vegetated zones) from four sections in July of the following 2 years: 2004 and 2008. The LWRs presented here include for all nine studied species (Pseudexostoma brachysoma Chu, 1979, Creteuchiloglanis gongshanensis [Chu, 1981], Glyptothorax zanaensis Wu, He & Chu, 1981, Glyptothorax dorsalis Vinciguerra, 1890, and Glyptothorax trilineatus Blyth, 1860, Schizothorax gongshanensis Tsao, 1964, Schizothorax meridionalis Tsao, 1964, Placocheilus cryptonemus Cui & Li, 1984, and Schistura longa [Zhu, 1982]), and new maximum standard length of four species not yet reported in the literature.     

Length–weight and length–length relationships of three cyprinid fishes from the Bibi‐Sayyedan River,western Iran

This study describes the length–weight and length–length relationships for three cyprinid species from the Bibi‐Sayyedan River (western Isfahan provinces, Iran). The slope parameter (b) values in the length–weight relationship equations were determined as 3.0729 for Alburnus mossulensis Heckel, 1843; 2.8509 for Barbus lacerta Heckel, 1843; and 3.0864 for Chondrostoma regium (Heckel, 1843). This study presents the first LWR and LLR references for these species in the Bibi‐Sayyedan River.