Length–length and length–weight relationships for eight drum species in southeastern Louisiana

Length–length and length–weight relationships can vary temporally and spatially, so it is imperative that accurate estimates of these relationships are available. Total length–standard length (TL‐SL) and standard length–total weight (SL–TW) relationships were calculated for eight species of drum (Sciaenidae) occurring in estuaries of southeastern Louisiana. Data were derived from monthly trawl, beach seine, and gillnet collections taken in and around Lake Pontchartrain between 2000 and 2012. Overall TL–SL relationships (ignoring the month) were found for seven species and overall SL–TW relationships were found for eight species. The strong r² values (all > 0.950, except for one instance) indicate that these relationships are robust and will be appropriate for use by scientists managing these species.     

Weight–length and length–length relationships for reef fish species from the Cape Verde Archipelago (tropical north‐eastern Atlantic)

This study reports weight–length and length–length relationships for selected coastal reef fish species of the Cape Verde Archipelago (tropical north‐eastern Atlantic). Specimens were caught with different types of gear (long‐lines, hand‐lines, purse‐seines and traps) during commercial fishing activities and sampled during fish market operations. A total of 8328 individuals were sampled, representing 29 species from 14 Families. This study provides the first references on weight–length and length–length relationships for five and 23 fish species worldwide, for 10 and 24 species for the Eastern Atlantic and for 12 and 26 species for Cape Verde Archipelago, respectively. Additionally, it provides revised weight–length relationships for 11 species from Cape Verde waters.     

Length–weight and length–length relationships of 20 fish species from the upper Yangtze River,southwest China

Length–weight (LWR) and length–length (LLR) relationships were estimated for 20 species of fish from the upper Yangtze River, southwest China. Samples were collected using multiple types of gear (2–6 cm mesh trammel nets, 2 cm mesh trap nets, and baited hooks) in Jiangjin and Yibin sections from 2007 to 2009. New maximum lengths for 16 species were recorded for FishBase. LWRs were significant for all species. Standard length–total length equations for converting size measurements for these 20 species are also presented. The results provide primary data for future fish research and conservation.     

Length–weight relationships and length–length relationships of 13 fish species in Rongcheng Bay,China

The present study provides the length–weight relationships (LWRs) of 13 fish species belonging to eight families that were collected in Rongcheng Bay, March 2009 to December 2014. The r² values ranged from 0.953 to 0.994 and values of b varied from 2.542 to 3.454. The study also describes the total length – standard length relationships (LLRs) for these fish species. This is the first record of length–weight and length–length relationships for the fish species in this area.     

Length–weight and length–length relationships for 23 fish species of Porto Primavera reservoir,Upper Paraná River,Brazil

The study presents length–weight relationships (LWR) and length–length relationships (LLR) for 23 fish species captured in the Porto Primavera Reservoir, Upper Paraná River. Seventeen of the LWRs and 20 of the LLRs are reported for the first time. New maximum standard lengths are presented for 17 species as well as weights for three species and new total weight records for 19 species.     

Length–weight and length–length relationships of fish species from the Chi River,northeastern Thailand

The relationships of total length (TL), fork length (FL) and standard length (SL) are presented for four fish species and the relationships between TL and wet weight for 23 fish species from the Chi River in northeastern Thailand. All length–length relationships were linear (r² > 0.95). Slope (b) of the length–weight relationships showed values between 2.5073 and 3.4896.     

Length–weight and length–length relationships of eight endemic Aphanius species from Turkey

Length–weight and length–length relationships were assessed for eight endemic Aphanius species from Turkey. This study provides a new reference on length–weight and length–length relationships and new maximum sizes for all species examined.     

Length–weight and length–length relationships of four native fish species from the Yalong River,China

Length‐weight and length‐length relationships were estimated for four native fish species from the Yalong River and its tributaries, China. A total of 976 specimens were collected monthly using trap nets and electric fishing in May 2013 and July 2015 to February 2016. This study presents the first references on LWRs (length–weight relationships) and LLRs (length–length relationships) for three species (Gymnocypris firmispinatus, Paracobitis variegatus and Euchiloglanis kishinouyei). Moreover, maturation length, absolute fecundity and predominant food items for the four species were also described in the study.     

Length–weight and length–length relationships of 11 fish species from the Sea of Okhotsk

Estimated length–weight relationships are presented for 11 marine fish species representing six families, found above the continental shelf and in the pelagial of the Okhotsk Sea. A total of 13,841 specimens were caught by trawls that were equipped with a 1.0 by 1.2 cm mesh webbing inset. The period between 1974 and 2015 comprised mostly spring and autumn months. All length–weight relationships were highly significant (r² ≥ .95) on a log scale. None of the species had previous length–weight estimates, and two species had no previous length–length estimates in the FishBase.     

Length–weight and length–length relationships for common fish and crayfish species in the Everglades,Florida, USA

Length–weight and length–length relationships are reported for 18 species of fish and two species of crayfish within the Everglades, FL, USA. This study provides updated relationships for native species, as well as initial relationships for established exotic species in this region. Additionally, 14 length–weight and two length–length relationships are presented to FishBase for the first time.     

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 and length–length relationships for four fish species of Upper Paranaíba river basin,Brazil

Here the length–weight and length–length relationships of four species are provided. Fishes were collected bimonthly from December 2015 to November 2016 with sieves and trawl net, with mesh size of 0.3 cm, in eight sites from the upper Paranaíba River basin, Southeastern Brazil. Fishes were measured (cm) and weighted (0.1 g) still in the field. First record of LWR and LLR are presented for three and four species, respectively.     

Length–weight and length–length relationships of three endemic fish species from the Yarlung Tsangpo River,China

The length‐weight (LWR) and length‐length relationships (LLR) were estimated for three endemic fish species, including Schizothorax waltoni Regan, 1905, Schizothorax oconnori Lloyd, 1908, and Schizothorax macropogon Regan, 1905 in the Yarlung Tsangpo River. A total of 399 specimens were collected using gillnets and cast nets during February to August 2012 and March to May 2013. No information regarding length–weight and length–length relationships was reported previously in FishBase for these three endemic species.     

Length–weight and length–length relationships for four shad species along the western Black Sea coast of Turkey

This study investigates length–weight and length–length relationships of four shad species (Alosa caspia caspia, Alosa immaculata, Alosa maeotica, Alosa tanaica) captured in the western Black Sea coast of Turkey. A total of 686 specimens, 355 females and 331 males, were caught by gill net, trammel net and longline from 2006 through 2007 along the western Black Sea coast of Turkey. The relationships of total length (TL), fork length (FL) and standard length (SL) are presented for inhabiting in the Black Sea four shad species and the relationships between total length (TL) and body weight (BW) from the two localities, Sile and Karasu in the western Black Sea coast of Turkey. The Length–weight relationships generally indicated positive allometric growth in Alosa species for both males and females and an isometric growth for A. immaculata females. The coefficient b ranged from a minimum 2.97 for females of A. immaculata to a maximum 3.75 for both sexes A. c. caspia. Results indicated that the length–length relationship between the three length measurements were highly correlated (r² > 0.99, P < 0.001).     

Length–weight and length–length relationships of 11 fish species from Zhimai River estuary,China

The present work provides the length–weight relationships (LWRs) and total length – standard length relationships (LLRs) of 11 fish species belonging to six families. The fishes were collected from seasonal bottom trawl surveys in the Zhimai River estuary, March 2011 to May 2013. This is the first record of LWRs and LLRs for several of the fish species in this area.     

Length–weight and length–length relationships of four endemic fish species from the middle reaches of the Yangtze River basin,China

Length–weight (LWR) and length–length relationships (LLR) were evaluated for four endemic fish species, including Hemibagrus macropterus Bleeker, 1870; Rhinogobio cylindricus Günther, 1888; Rhinogobio typus Bleeker, 1871; and Siniperca scherzeri Steindachner, 1892, in the middle reaches of the Yangtze River basin. A total of 252 specimens were collected using gillnets and cast nets between November 2014 and January 2016. No information regarding length–weight and length–length relationships were reported previously in FishBase for these four endemic species.     

Length–weight and length–length relationships for three endemic Pseudophoxinus species in Turkey

Length–weight and length–length relationships are presented for three endemic Pseudophoxinus species in Turkey. This study provides the first references for these relationships in the species examined.     

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.     

Length–weight and length–length relationships for cavedano chub Squalius squalus (Bonaparte, 1837) in Italy

Data of 31496 specimens of cavedano chub Squalius squalus were collected in 89 different waterbodies distributed geographically throughout Italy and used to provide length–weight and length–length relationship for this species. The linear relationship between total length (TL) and standard length (SL) was described by the equation TL (cm) = 4.007 + 0.874 SL (cm). The resulting total length–weight equation for cavedano chub in Italy was: log₁₀ W = ?2.121 + 3.083 log₁₀ TL (cm).