scholarly journals Morphometric Characters and Sex Ratio of the Freshwater Garfish, Xenentodon Cancila Collected From Different Waters of Jashore, South-Western Bangladesh

2021 ◽  
pp. 23-31
Author(s):  
MS Islam ◽  
P Laboni
Keyword(s):  
Sex Ratio ◽  
Maximum Size ◽  
Size Class ◽  
Strongly Correlated ◽  
Morphometric Characters ◽  
Xenentodon Cancila ◽  
Mean Size ◽  
Food Fish ◽  
Biological Aspects ◽  
The Mean

The freshwater garfish, Xenentodon cancila is one of the important food fish in Bangladesh. The size class distribution, length-weight relationships, and sex ratio of X. cancila are described in the present study. A total of 138 specimens were collected randomly for a year from the local fish markets and/or direct from fishermen who fish primarily in nearby waters (Beel, Canal and Baor) of Jashore, southwestern Bangladesh. Most individuals were collected in the rainy season and their mean size was larger compare to the other two seasons (summer and winter). The maximum size recorded 254.1 mm total length (TL) and 38.05 g body weight (BW). The mean TL and BW were 166.35±38.17 mm and 11.16±7.47g, respectively. Most of the individuals belonged to the size class of 141-180 mm. The length-weight relationship (LWR) was strongly correlated as the regression value was 0.876 and the relationships were linear in both sexes. The allometric coefficient ‘b’ of the LWR indicated nearly positive allometric growth and the value was 2.98. The male fishes were dominant over females and the ratio was 1: 0.77. These research outcomes would be useful for the researcher to better understand the biological aspects of freshwater garfish in the nearby waters of Jashore area in south-western Bangladesh. J. Bio-Sci. 29(1): 23-31, 2021 (June)

scholarly journals ASPEK BIOLOGI DAN PARAMETER POPULASI UDANG JINGA (Metapenaeus affinis H. Milne Edwards, 1837) DI PERAIRAN KOTABARU, KALIMANTAN SELATAN

2017 ◽  
Vol 9 (1) ◽  
pp. 11
Author(s):  
Tirtadanu Tirtadanu ◽  
Suprapto Suprapto ◽  
Ali Suman
Keyword(s):  
Growth Parameters ◽  
Growth Function ◽  
Fishing Effort ◽  
Population Parameters ◽  
Male And Female ◽  
Management Measures ◽  
Exploitation Rate ◽  
Mean Size ◽  
Biological Aspects ◽  
The Mean

Udang jinga (Metapenaeus affinis H. Milne Edwards, 1837) merupakan salah satu jenis udang ekonomis penting yang diusahakan di perairan Kotabaru dan saat ini produksinya cenderung mengalami penurunan. Salah satu data dan informasi yang diperlukan dalam mengkaji tingkat pemanfaatan dan dasar pengelolaannya adalah aspek biologi dan parameter populasi. Penelitian ini bertujuan mengkaji aspek biologi dan parameter populasi udang jinga sebagai bahan kebijakan pengelolaan perikanan udang di perairan Kotabaru, Kalimantan Selatan. Penelitian dilakukan pada bulan Januari – November 2016 di perairan Kotabaru. Parameter pertumbuhan diestimasi berdasarkan pergeseran modus struktur ukuran panjang dengan metode ELEFAN I. Hasil penelitian menunjukkan rata-rata ukuran udang jinga (M. affinis) betina yang tertangkap adalah 23,6 ± 3,45 mmCL dengan modus ukuran 24 mmCL dan rata-rata ukuran udang jantan adalah 20,7 ± 2,9 mm dengan modus ukuran 18 mmCL. Nisbah kelamin udang jinga jantan dan betina adalah 1 : 2,5. Musim pemijahan udang jinga diduga berlangsung sepanjang tahun dan puncak pada bulan Maret. Ukuran rata-rata pertama kali tertangkap (Lc) udang lebih kecil dari ukuran rata-rata pertama kali matang gonad (Lm) (21,7 < 28,5 mm CL) sehingga sebagian besar udang tertangkap berukuran kecil dan belum memijah. Persamaan pertumbuhan udang jinga jantan  CL(t)=35,95(1-e-2.02(t+0,31) dan udang jinga betina CL(t)= 38,3(1-e-1,92(t+0,29)). Tingkat pemanfaatan udang (E) menunjukkan lebih tangkap (overfishing) yakni 0,70/tahun pada jantan dan 0,73/tahun pada betina. Dengan demikian disarankan untuk melakukan pengurangan upaya penangkapan sebesar 40% dan penutupan musim penangkapan di bulan Maret.The jinga shrimp (Metapenaeus affinis H. Milne Edwards, 1837) was one of important commodity that was exploited in Kotabaru Waters, yet the production tend to be declined recently. The data and information on biological aspects and population parameters are needed to investigate the exploitation level and the basis of management measures. This research aims to investigate the biological aspects and population parameters of jinga shrimp Kotabaru waters, South of Kalimantan. This research was conducted on January – November 2016. The growth parameters were estimated as movement of length frequency mode by ELEFAN I method. The results showed that the mean size of female jinga shrimp (M. affinis) was 23,6 ± 3,45 mm CL and the mode was 24 mmCL. While, the mean size of male jinga shrimp was 20,7 ± 2.9 mm CL and the mode was 18 mmCL. The sex ratio of male and female shrimp was 1 : 2,5 . Spawning season of jinga shrimp was estimated throughout the year and the peak was in March. The length at first captured (Lc) was shorter than length at first matured (Lm) (21,7 < 28,5 mm CL). That means most of the catches was immature. The growth function of male and female jinga shrimp were and, CL(t)=35,95(1-e-2.02(t+0,31) respectively and CL(t)= 38,3(1-e-1,92(t+0,29)). The exploitation rate (E) of male and female shrimp fishing were  0,70/year 0,73/year, respectively. The reduction of fishing effort needed by 40% of the actual combined with the temporal fishing closure March.

scholarly journals Some Biological Aspects of Al - Shabbot Arabibarbus grypus (Heckel, 1843) in Al-Diwanyia River, Middle of Iraq

2019 ◽  
Vol 27 (2) ◽  
pp. 306-316
Author(s):  
Mohanad O. Abdullah Al-Jubouri ◽  
Abdul-Razak M. Mohamed
Keyword(s):  
Sex Ratio ◽  
Condition Factor ◽  
Age Groups ◽  
Allometric Growth ◽  
Relative Condition Factor ◽  
Fish Catch ◽  
Total Fish ◽  
Biological Aspects ◽  
The Mean ◽  
Somatic Index

      Some biological characteristics of shabbot, Arabibarbus grypus (Heckel, 1843) in the Al-Diwaniya River, middle of Iraq were studied from October 2016 to September 2017. Water temperature ranged from 10.2oC in March to 32.8oC in August. A total of 853 fish were caught by seine, gill and cast nets and electro-fishing. A. grypus constituted about 6.27% of the total fish catch. The length-weight relationship was W=0.021*L2.7548 revealing an allometric growth. The mean relative condition factor was 0.91. Five age groups wore recorded and their mean total lengths were 20.2, 32.0, 39.0, 43.9 and 48.4 cm, respectively. The growth model of the species was  Lt= 58 [1-e -0.39 (t-0.313)]. The growth performance index (Φ) of A. grypus was computed as 3.11. The study declares that the species is a omnivore, feeding mainly on aquatic plants, insects, algae and detritus. The overall sex ratio (female: male) was 1.47:1. The highest values of gonado- somatic index (GSI) were 4.20 for female and 1.78 for males in April. The fecundity of the species ranged from 75600 to 124200 eggs. 

scholarly journals Reproductive biology aspects of Alopias pelagicus and A. superciliosus (Lamniformes: Alopiidae) in the Ecuadorian Pacific

2021 ◽  
Vol 19 (4) ◽  
Author(s):  
Jesús Briones-Mendoza ◽  
Pol Carrasco-Puig ◽  
Daniel Toala-Franco
Keyword(s):  
Sex Ratio ◽  
Reproductive Biology ◽  
Sexual Maturity ◽  
Inflection Point ◽  
Maximum Size ◽  
Size Class ◽  
Shark Species ◽  
Thresher Shark

ABSTRACT The reproductive biology of thresher shark species of the Ecuadorian Pacific was analysed based on 1236 specimens of Alopias pelagicus (711 females and 525 males) and 354 of A. superciliosus (164 females and 190 males) landed in “Playita Mía”, from January to December of 2019. The length of A. pelagicus females ranged between 67.2 and 184 cm PCL (precaudal length) and the males between 69.0 and 178.4 cm PCL, A. superciliosus registered a minimum and maximum size of 76.0 and 202.2 cm PCL for females and 94.0 and 204.8 cm PCL for males. The most frequently captured size class for A. pelagicus was 147.2−157.2 cm PCL and for A. superciliosus was 156.0-166.0 cm PCL. The sex ratio (F:M) for A. pelagicus and A. superciliosus was 1.35F:1M and 0.86F:1M respectively. For A. pelagicus males the inflection point of the clasper length adjustment, was 134.2 cm PCL and size at first sexual maturity (L 50 ) was estimated at 136.0 cm PCL. For A. superciliosus males the inflection point of the clasper length adjustment, was 136.8 cm PCL, and the first sexual maturity (L 50 ) was estimated at 138.7 cm PCL.

scholarly journals Biologie De La Reproduction Du Sciaenidae Pseudotolithus Elongatus Dans La Lagune Ebrie (Cote d’Ivoire)

2016 ◽  
Vol 12 (6) ◽  
pp. 327
Author(s):  
Koné Tiéhoua ◽  
Kouakou Fokouo Kessia Irène ◽  
Konan Kouassi Sylvain ◽  
N’Da Konan
Keyword(s):  
Sex Ratio ◽  
Condition Factor ◽  
Size Class ◽  
Breeding Period ◽  
Total Length ◽  
Mean Diameter ◽  
Liver Somatic Index ◽  
The Mean ◽  
First Maturity ◽  
Somatic Index

The study of reproduction of Pseudotolithus elongatus in the Ebrie lagoon was investigated between July 2013 and June 2015 on a whole of individuals of 550 specimens. the total length ranges from 14.5 to 42.7 cm. The monthly evolution of the gonado-somatic index (GSI), the liver-somatic index (LSI), the condition factor (K), the Sex-ratio, the fecundity, the diameter of eggs revealed that this species spawns throughout the year but the main breeding period was in raining season. Sex-ratio observed was in favour of females (1: 1. 14; X2 = 2.26; p > 0.05). The percentage of mature specimens by sexes was calculated for each size class. Total length at first maturity was 21.06 cm for females and 20.21cm for males. The ripe ovaries contained 39883-814757 eggs. The relative fecundity was 216-1979 eggs per g of body weight of females. And the mean diameter of eggs is 336 ±138 microns.

scholarly journals Analysis of some biological aspects of the Blue-spotted tilapia, Oreochromis leucostictus (Trewavas, 1933) in Lake Naivasha, Kenya

2020 ◽  
Author(s):  
Cishahayo Laurent ◽  
Edwine Yongo ◽  
Edna Waithaka ◽  
Eunice Mutethya
Keyword(s):  
Sex Ratio ◽  
Growth Condition ◽  
Condition Factor ◽  
Lake Naivasha ◽  
Weight Relationship ◽  
Total Length ◽  
Fish Samples ◽  
Commercially Important ◽  
Biological Aspects ◽  
The Mean

Oreochromis leucostictus is one of the commercially important tilapiine in Lake Naivasha. Its stock in the lake has declined due to the effect of fishing and pollution. This study investigated on its length-weight relationship, condition factor, sex ratio and maturity. Fish samples (233) were caught using gillnets of mesh-sizes 2-5 inches. Each individual fish was measured (cm) and weighed (g) in the field. The specimens were preserved in ice and transported to the laboratory for analysis of maturity. The mean (±SE) total length and weight for all fish was 21.3±0.3 cm TL and 187.4±8.3 g, respectively. Males 22.3±0.4 cm were significantly larger than females 19.2±0.5 cm. The mean condition factor was 1.06, 0.99 and 1.04 for male, female and combined sexes, respectively. The overall population sex ratio was 2.19:1.0 (male: female) that deviated significantly from 1:1. The slope b of the length-weight relationship was 1.92, 3.07, 2.33 for males, females, and combined sexes, respectively. Length at 50% maturity was estimated at 21.0 cm for females and 26.0 cm for males. Ripe oocytes and testis were found in all fish sizes. Comparisons with earlier studies suggest that the parameters of its growth, condition and maturity vary greatly from the different habitats.

scholarly journals SEBARAN FREKUENSI PANJANG, HUBUNGAN PANJANG-BERAT, TINGKAT KEMATANGAN GONAD DAN RATA-RATA UKURAN PERTAMA KALI MATANG GONAD UDANG PUTIH (Penaeus merguiensis De Man, 1888) DI PERAIRAN KOTABARU, KALIMANTAN SELATAN

2018 ◽  
Vol 9 (3) ◽  
pp. 145
Author(s):  
Tirtadanu Tirtadanu ◽  
Suprapto Suprapto ◽  
Ali Suman
Keyword(s):  
Random Sampling ◽  
Management Strategy ◽  
Landing Site ◽  
Length Frequency ◽  
Fishing Season ◽  
Mean Size ◽  
Biological Aspects ◽  
The Mean ◽  
De Man ◽  
Penaeus Merguiensis

Pengusahaan udang putih (Penaeus merguiensis De Man, 1888) di perairan sekitar Kotabaru memerlukan upaya pengelolaan agar perikanan udang dapat berkelanjutan.Salah satu informasi penting yang diperlukan sebagai dasar dalam pengelolaannya yaitu aspek biologi.Tujuan penelitian adalah mengkaji sebaran frekuensi panjang, hubungan panjang-berat, tingkat kematangan gonad dan rata-rata ukuran pertama kali matang gonad udang putih di perairan sekitar Kotabaru. Pengumpulan data diperoleh dari tempat pendaratan udang di Kotabaru pada bulan Januari – November 2016. Metode pengambilan sampel yang digunakan adalah random sampling. Hasil penelitian menunjukkan ukuran udang putih yang tertangkap cenderung kecil dengan ukuran berkisar antara 14 - 46 mmCL dan rata-rata sebesar 26 ± 3,7 mmCL pada udang jantan dan 28,5 ± 5,3 mmCL pada udang betina. Pola pertumbuhan bersifat allometrik negatif dan telah terjadi penurunan bobot dibandingkan beberapa tahun sebelumnya. Proporsi tertinggi udang matang gonad terjadi pada bulan Maret sehingga diduga merupakan puncak pemijahan udang putih.Ukuran pertama kali tertangkap udang (Lc = 28,1 mmCL) lebih kecil dibandingkan ukuran pertama kali matang gonad (Lm = 35,3 mmCL) sehingga sebagian besar udang yang tertangkap belum melakukan pemijahan. Dalam rangka menjaga keberlanjutan sumberdaya udang putih di Kotabaru, disarankan melakukan penutupan penangkapan di bulan Maret dan penggunaan alat tangkap ramah lingkungan dengan ukuran minimum tertangkap lebih besar dari 35 mmCL atau kurang dari 27 ekor dalam 1 kg.The exploitation of banana prawn (Penaeus merguiensis De Man, 1888) in Kotabaru Waters need management strategy, so the prawn fisheries in Kotabaru waters could be sustainably exploited. The important information needed for its basis management are was biological aspects of banana prawn. The aim of this research were to study about length frequency, length-weight relationship, maturity stages and length at first first mature of banana prawn in Kotabaru Waters. The research was conducted at landing site of prawn in Kotabaru and the samples were collected in January – November 2016. The method used for sampling was random sampling. The results showed that the size of banana prawn tend to become smaller with the size between 14-46 mmCL and the mean size were 26 ± 3,7 mmCL for male and 28,5 ± 5,3 mmCL for female. The growth pattern of banana prawn was allometric negative and the weights decreased from the previous years. The highest proportion of mature prawns was in March, likely suggestes to be the spawning season of banana prawn. Length at first captured of banana prawns (Lc = 28,1 mmCL) was lower than length at first matured (Lm = 35,3 mmCL) so most of prawns captured has not spawn yet. For sustainability of banana prawn resources in Kotabaru Waters, it is suggested to close fishing season in March and minimum legal size should be bigger than 35 mmCL or less than 27 prawns in 1 kg.

scholarly journals Biological aspects of the Sailfin dory Zenopsis conchifer (Lowe, 1852) caught by deep-sea trawling fishery off southern Brazil

2012 ◽  
Vol 60 (2) ◽  
pp. 171-179 ◽  
Author(s):  
Rodrigo Silvestre Martins ◽  
Paulo Ricardo Schwingel
Keyword(s):  
Sex Ratio ◽  
Deep Sea ◽  
Reproductive Activity ◽  
Austral Winter ◽  
Southern Brazil ◽  
Bottom Trawling ◽  
Size Classes ◽  
Biological Aspects ◽  
The Mean

Biological aspects of sailfin dory, Zenopsis conchifer, were studied from 839 individuals obtained from deep-sea commercial bottom trawling off southern Brazil at depths up to 526 m in 2002 and 2003. Samples included fish from 101 mm Lt and 15 g up to 640 mm Lt and 2,9 g. The sex-ratio was 50% at 150 mm Lt and between 300-350 mm Lt, with females outnumbering males in the remaining size classes. Reproductive activity seems to peak between July and August (austral winter). Size at attainment of 50% maturity (Lt50) was 311 mm Lt in females. The mean length and maturity of the specimens increased with depth, suggesting that larger fish concentrate in deeper waters.

The Concurrent Validity of the Minnesota Child Development Inventory as a Measure of Young Children's Language Development

1989 ◽  
Vol 54 (1) ◽  
pp. 101-105 ◽  
Author(s):  
J. Bruce Tomblin ◽  
Cynthia M. Shonrock ◽  
James C. Hardy
Keyword(s):  
Child Development ◽  
Language Development ◽  
Expressive Language ◽  
Strong Predictor ◽  
Receptive Language ◽  
Strongly Correlated ◽  
Language Measure ◽  
The Mean ◽  
Child Development Inventory ◽  
Mean Length Of Utterance

The extent to which the Minnesota Child Development Inventory (MCDI), could be used to estimate levels of language development in 2-year-old children was examined. Fifty-seven children between 23 and 28 months were given the Sequenced Inventory of Communication Development (SICD), and at the same time a parent completed the MCDI. In addition the mean length of utterance (MLU) was obtained for each child from a spontaneous speech sample. The MCDI Expressive Language scale was found to be a strong predictor of both the SICD Expressive scale and MLU. The MCDI Comprehension-Conceptual scale, presumably a receptive language measure, was moderately correlated with the SICD Receptive scale; however, it was also strongly correlated with the expressive measures. These results demonstrated that the Expressive Language scale of the MCDI was a valid predictor of expressive language for 2-year-old children. The MCDI Comprehension-Conceptual scale appeared to assess both receptive and expressive language, thus complicating its interpretation.

Batch Precipitation of Lead Iodide

1994 ◽  
Vol 59 (6) ◽  
pp. 1301-1304
Author(s):  
Jaroslav Nývlt ◽  
Stanislav Žáček
Keyword(s):  
Aqueous Solution ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Crystal Size ◽  
Lead Nitrate ◽  
Lead Iodide ◽  
Constant Rate ◽  
Mean Size ◽  
The Mean

Lead iodide was precipitated by a procedure in which an aqueous solution of potassium iodide at a concentration of 0.03, 0.10 or 0.20 mol l-1 was stirred while an aqueous solution of lead nitrate at one-half concentration was added at a constant rate. The mean size of the PbI2 crystals was determined by evaluating the particle size distribution, which was measured sedimentometrically. The dependence of the mean crystal size on the duration of the experiment exhibited a minimum for any of the concentrations applied. The reason for this is discussed.

scholarly journals Effects of topical gel formulation of Ficus carica latex on cutaneous leishmaniasis induced by Leishmania major in BALB/c mice

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Ali Pouryousef ◽  
Erfan Eslami ◽  
Sepehr Shahriarirad ◽  
Sina Zoghi ◽  
Mehdi Emami ◽  
...  
Keyword(s):  
Cutaneous Leishmaniasis ◽  
Murine Model ◽  
Leishmania Major ◽  
Considerable Effect ◽  
Ficus Carica ◽  
Control Group ◽  
Topical Gel ◽  
The Third ◽  
Mean Size ◽  
The Mean

Abstract Objectives The current study aimed to evaluate the effects of Ficus carica latex on the treatment of cutaneous leishmaniasis (CL), induced by Leishmania major. A 5% topical gel with F. carica latex was prepared. BALB/c mice were infected by inoculation of amastigotes form of L. major. Thirty BALB/c mice were divided into five groups, where the first group was treated daily, the second group twice per day, and the third group every other day with the 5% topical gel, for 3 weeks. The sizes of the lesions were measured before and during the course of treatment. Results Although the mean size of lesions in the mice group treated with the 5% F. carica gel, especially in the group receiving daily treatment, was less than the mean size of the lesions in the control group, yet, the differences was not statistically significant (p > 0.05). The findings of the current study demonstrated that the 5% F. carica latex with a 3-week course of treatment had no considerable effect in recovery or control of CL induced by L. major in the murine model. Using higher concentration of F. carica latex and with longer treatment lengths may increase its efficacy in the treatment of CL.

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