Length–weight and length–length relationships of 16 fish species from Amapá, Brazilian Amazon

The present study provides length‐weight (LWR) and total length‐standard length (LLR) relationships for 16 freshwater fish species collected in coastal rivers of the northern Brazilian, state of Amapá in 2015. Fishes were caught in heterogenic environments like ponds, stream and river channel with sieve and trawl. As result, we present novel information of LWR and LLR for 11 and 15 species, respectively. Maximum values (first values or new maximum values) of TL, SL and WT are presented for 14, 12 and 15 species, respectively.     

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 relationships for 11 species at three small hydropower plants on the Sapucaí‐Mirim River (Grande River basin,Brazil)

This paper presents length–weight relationships (LWR) for 11 freshwater fish species from the Sapucaí‐Mirim River, a tributary of the Grande River basin, São Paulo, Brazil. The specimens were captured in quarterly samplings between March 2011 and December 2014, using gillnets of mesh size: 1.5–9.0 cm between knots. The present study adds new information for the maximum length of seven species, and presents new LWR records for four species.     

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 three Blenny species from the Persian Gulf and the Gulf of Oman

The present study provides the length–weight and length–length relationships information (LWR & LLR) for three Blenny species; Antennablennius adenensis from the coast of Larak Island in the Persian Gulf and Istiblennius pox and Omobranchus mekranensis, which were captured in the coasts of Chabahar city in the Gulf of Oman, Iran. Total length (TL) and standard length (SL) were determined as well as weight. Specimens were collected occasionally in summer 2017 and winter 2018 by Hand net. The length–weight parameter b for these species was 2.84, 3.29 and 3.06 respectively with a high coefficient of determination (r² ≥ 0.95). All LLRs were highly correlated (r² > 0.99). All three species had no previous report for LWR and LLR estimates in FishBase.     

The weight‐length relationship of fish species found in the tidal creeks of the Amazon estuary,northern Brazil

The present study estimated the a and b parameters of the weight‐length relationship of five fish species that inhabit the tidal creeks of islands in the Amazon estuary: Colomesus asellus, Geophagus proximus, Lithodoras dorsalis, Pseudauchenipterus nodosus, Pachypops fourcroi. The species were collected quarterly between October 2013 to July 2014 using block nets made from 20 mm mesh size. The b coefficient of the regression of the weight on the total length of these species ranged from 2.71 to 3.14. These are the first reference on the weight‐length relationship for three species and the new maximum length recorded for two species.     

Length–weight relationships for juvenile and small‐sized adult fishes of the surf zone

The present work provides length–weight relationships for 16 species captured in the surf zone of six sandy beaches near the mouth of the estuarine system of the Piraquê‐açú and Piraquê‐mirim rivers, southeastern Brazil.     

Length–weight and length–length relationships of fish species from the Aegean Sea (Greece)

We present the relationships between total (TL), fork (FL) and standard (SL) length for 37 fish species and the relationships between TL and wet weight for 40 fish species from the Aegean Sea (Cyclades; Greece). The relationships between TL, FL and SL were all linear (for all cases: r ² > 0.928). The values of the exponent b of the length–weight relationships ranged from 2.235 to 3.704.     

The development of length–weight relationships for four pelagic fish species in the tropical Northwest Pacific Ocean

The present study provides the length–weight relationships (LWRs) for four pelagic fish species belonging to three families sampled with the longline gear from the tropical Northwest Pacific Ocean. The sampling was conducted by the Chinese longline observers from June 2011 to September 2012 and the fishes were captured by commercial pelagic longline fleets. The circular size 4.0 sun‐C‐37 Japanese tuna hook design was used for this fishing operation. Length–weight relationship for one of these species is unknown to Fish Base. Additionally, a new maximum length of one fish species is identified in the study.     

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 relationships for freshwater fish species from the Pantanal of the Negro River,Brazil

The present study describes the length‐weight relationships (LWRs) of 28 species captured in Santa Virgínia Bay, in the Pantanal of the Negro River, Mato Grosso do Sul State, Brazil, over 3 years (1999 to 2001). The study provides the first references on LWRs for thirteen of these species.     

Length–weight relationships of 18 fish species from Paraíba do Sul basin,Minas Gerais,Brazil

The present study established the length–weight relationships (LWRs) for 18 species of freshwater fish from Paraíba do Sul River basin, southeastern Brazil. LWR parameters are estimated for the first time for seven of these species. The allometric coefficient b varied from 2.81 to 3.32. These data complement the effort to understand the biology of one of the most threatened Brazilian basins.     

Length‐weight and length‐length relationships of five fish species from the Zigui section of the lower Three Gorges Reservoir,Hubei Province,China

This paper provides the length‐weight and length–length relationships for five fish species in the Zigui section of the lower Three Gorges Reservoir of the Yangtze River. Specimens were collected from December 2014 to January 2017, using various types of fishing gear and electroshock fishing techniques. Length‐weight relationships (LWRs) for one fish species and Length–length relationships (LLRs) for five fish species are unknown to FishBase. New maximum total lengths for four species were also recorded for FishBase. Moreover, standard‐length to total‐length equations for converting size measurements for these five species are presented.     

Length–weight and length–length relationships of the vulnerable dark mahseer Puntius chelynoides (McClelland, 1839) from Garhwal Himalaya,India

The present study describes the length–weight (LWR) and length–length relationships (LLR) of Puntius chelynoides (McClelland, 1839), commonly known as the dark mahseer, a coldwater fish species which inhabits fast‐flowing hill‐streams of India and Nepal. A total of 422 specimens were collected between January and June 2010 from a spring‐fed stream in Garhwal Himalaya, India. No information regarding LWRs, LLRs or K of this species was available in FishBase.     

Length‐weight relationships of 20 fish species in the Guandu River,Rio de Janeiro State,Southeastern Brazil

The present work reports the length–weight relationships (LWR) for 20 fish species from the Guandu River basin, Southeastern, Brazil, a lotic system that supplies most of the water for Rio de Janeiro Municipality and nearby cities. Length–weight relationships for nine of these species were unknown to Fishbase, and new maximum lengths are given for eight of the species.     

Length–weight relationships of 13 species from a flow regulated Balkan river

The length–weight relationships of 13 species from river Nestos (North Greece) were calculated in the present study, seven of which are presented for the first time. Significant length–weight relationships with high correlation coefficient were found for all species. The value of the parameter b varied between 2.36 and 3.27 (mean value ± SE: 3.05 ± 0.06).     

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.     

Weight–length relationships of 36 fish species from the River Strymon system (northern Greece)

We present 54 weight–length relationships pertaining to 36 fish species, caught in the Greek part of the River Strymon system (northern Greece). The total weight (W) – total length (TL) relationships were estimated using the logarithmic form of the equation W = aTL^b. The exponent b ranged between 2.34 and 3.95, (mean ± SE: 3.16 ± 0.044). For 5 out of the 36 species weight–length parameters are presented for the first time.     

Length–weight relationships of 26 fish species from the middle section of the Negro River (Tacuarembó‐Durazno,Uruguay)

This study provides data on the length–weight relationship (LWR) for 26 species of neotropical fishes. Specimens were collected between 2008 and 2009 from a dam‐enclosed section of the middle Negro River (Uruguay). This study represents the first reference on length–weight relationships for 17 species, and also provides new maximum sizes for eight species.     

Condition factor,length–weight and length–length relationships of an endangered fish Ompok pabda (Hamilton 1822) (Siluriformes: Siluridae) from the River Gomti,a tributary of the River Ganga,India

The present study describes the condition factor, length‐weight and length‐length relationships for an endangered freshwater fish species Ompok pabda (Hamilton) of the family Siluridae from the River Gomti in Northern India. The values of regression parameter b ranged from 2.81 to 3.32 (r² > 0.90). During the pre‐monsoon, the allometric coefficient b of the LWR was close to isometric value (b = 3.08) allometric (b = 2.87), although it suggested negative allometric growth in monsoon periods while positive growth in post‐monsoon. The condition factor values ranged from 0.672 to 0.744. Results of the present study could be useful to help in conservation and sustainable fisheries management of this endangered species.