scholarly journals KOMPOSISI UKURAN, PERBANDINGAN JENIS KELAMIN, DAN TINGKAT KEMATANGAN GONAD IKAN TODAK BERPARUH PENDEK (Tetrapturus angustirostris) DI SAMUDERAHINDIA

2017 ◽  
Vol 3 (2) ◽  
pp. 123
Author(s):  
Dian Novianto ◽  
Budi Nugraha ◽  
Andi Bahtiar
Keyword(s):  
Indian Ocean ◽  
Sex Ratio ◽  
Size Composition ◽  
Maturity Stage ◽  
Chi Square ◽  
Male And Female ◽  
Level Ii ◽  
Chi Square Test ◽  
The Indian Ocean ◽  
Tuna Longline

Ikan todak berparuh pendek atau ikan tumbuk atau shortbill spearfish (Tetrapturus angustirostris) merupakan salah satu hasil tangkapan sampingan rawai tuna. Informasi mengenai ikan todak berparuh pendek seperti komposisi ukuran, perbandingan kelamin, dan tingkat kematangan gonadsangat terbatas. Tulisan ini bertujuan untuk menyajikan data dan informasi mengenai aspek biologi ikan todak berparuh pendek yang merupakan hasil tangkapan sampingan dari rawai tuna yang beroperasi di Samudera Hindia. Penelitian ini dilakukan pada bulan September sampai Desember 2008 di perairan Samudera Hindia. Hasil penelitian menunjukan bahwa ikan todak berparuh pendek memiliki kisaran panjang tubuh 135-175 cmLJFL dan modus pada kisaran 155-165 cmLJFL.Perbandingan jenis kelamin ikan jantan dan betina 1:13,5, berdasarkan atas hasil uji chi-square menunjukan bahwa rasio ikan jantan dan betina pada periode penelitian ini tidak seimbang. Pada bulan September ikan todak berparuh pendek betina didominansi oleh tingkat kematangan gonad IIsebesar 66,7%, bulan Oktober oleh tingkat kematangan gonad V sebesar 46,2%, bulan Nopember oleh tingkat kematangan gonad II sebesar 53,3%, sedangkan pada bulan Desember oleh tingkat kematangan gonad III sebesar 42,9%. Pada bulan Nopember sampai Desember terlihat bahwa tingkat kematangan gonad V mulai berkurang, hal ini menunjukan bahwa pada bulan Nopember sampai Desember diduga banyak ikan todak berparuh pendek betina yang sudah memijah. Shortbill Spearfish (Tetrapturus angustirostris) is one of bycatch of tuna longline. Information about shortbill spearfish on the size composition, sex ratio, and maturity stage is still very limited. The objective this paper is to present the data and information about shortbill spearfish which is a bycatch of tuna longline that operated in the Indian Ocean. Research was conducted during September until December 2008 in Indian Ocean. The results showed that the shortbill spearfish have body length about 135-175 cmLJFL and modes in 155-165 cmLJFL. Sex ratio of the male and female was 1:13.5. Based on chi-square test showed that the ratio of male and female in the period of the study was not balanced. In September, the female stage maturity was dominated by level II of 66.7%, October by level V of 46.2%, November by level II of 53.3%, and December by level III of 42.9%. During November until December showed that the maturity stage of level V was decreased, this shows that in this time the female of shortbill spearfish was spawned.

scholarly journals BEBERAPAASPEKBIOLOGI IKANBELOSO(Sauridamicropectoralis) DI PERAIRANUTARAJAWATENGAH

2017 ◽  
Vol 3 (6) ◽  
pp. 363
Author(s):  
Adrian Damora ◽  
Tri Ernawati
Keyword(s):  
Sex Ratio ◽  
Maturity Stage ◽  
Chi Square ◽  
Central Java ◽  
Weight Growth ◽  
Gonadal Maturity ◽  
Carnivorous Species ◽  
Chi Square Test ◽  
Java Sea ◽  
Stadium I

Indeks kelimpahan stok ikan beloso (Saurida micropectoralis) di Laut Jawa cenderungmengalami penurunan dari tahun ke tahun dan untuk mencegahnya perlu bahan masukan yang bersumber dari hasil penelitian yang dijadikan sebagai dasar pengelolaannya. Penelitian dilakukan untukmengkaji beberapa aspek biologimeliputi hubungan panjangberat, nisbah kelamin, tingkat kematangan gonad, panjang pertama kali tertangkap dan panjang pertama kali matang gonad, serta kebiasaan makan ikan beloso. Penelitian dilakukan pada bulanApril–Agustus 2009 di perairan utara Jawa Tengah. Hasil penelitian menunjukkan bahwa nisbah kelamin ikan jantan dan betina berada dalam keadaan tidak seimbang. Pertumbuhan ikan beloso bersifat allometrik positif, dimana pertambahan berat lebih cepat dibandingkan pertumbuhan panjangnya dan tingkat kematangan gonad (TKG) ikan beloso didominasi oleh stadium I. Panjang pertama kali ikan beloso tertangkap lebih kecil dari panjang pertama kali matang gonadnya (Lc < Lm) sehingga akan mengancam kelestariaannya. Ikan beloso bersifat karnivora, dimana makanan utamanya adalah potongan ikan dasar, cumi, dan teri. Index of stock abundance of Lizardfish (Saurida micropectoralis) in Java Sea tend to decreased from year to year. The decline was expected because of the potential of Lizardfish decreasing but the effort continue to rise. The objective of this study is to assess the biological aspects including length-weight relationship, sex ratio, gonadal maturity stage, length of first capture (Lc) and length of first mature (Lm), and feeding habit of Lizardfish in north waters of Central Java. This study was conducted from April to August 2009 in north waters of Central Java. Results showed that the sex ratio between males and females was 1:0,97. Based on Chi-square test it is showed that sex ratio is not balanced. The growth of Lizardfish indicated positive allometric where the weight growth more faster than its length growth. The gonadalmaturity stage of Lizard fish is dominated by the first stage. The length of first capture of Lizardfish was under the length of first mature (Lc < Lm) so that will threaten its sustainability. Lizardfish was indicated carnivorous species where its main food are part of demersal fishes, squids and anchovies.

scholarly journals REPRODUCTIVE BIOLOGY OF POKEA CLAM Batissa violacea var. celebensis, VON MARTENS 1897 AT LASOLO ESTUARY, SOUTHEAST SULAWESI

2017 ◽  
Vol 9 (1) ◽  
pp. 9-18
Author(s):  
. Bahtiar
Keyword(s):  
Sex Ratio ◽  
Quantitative Description ◽  
Female Gonad ◽  
Reproductive Pattern ◽  
Maturity Stage ◽  
Chi Square ◽  
Male And Female ◽  
Gonad Maturity ◽  
Gonadal Maturity ◽  
Traditional Fishing

Pokea clam Batissa violacea var. celebensis von Martens 1897 that inhabits the substrates of some estuaries in Southeast Sulawesi has a tendency to have different reproductive pattern. The aim of this study was to determine the sex ratio, gonadal maturity stage (TKG), gonadal maturity index (IKG) and the size at first gonad maturity of pokea in Lasolo estuary, Southeast Sulawesi.  Samples were randomly collected using a traditional fishing gear called tangge.  Sex ratio, TKG, IKG, and the size at first gonad maturity were determined using standard methods and formulas and then analyzed using Chi Square, quantitative description and non-linear regression. The results showed that the number of males were higher than the numbers of females, ranging from 71.85-89.84% and 10.16-28.15%, respectively.  Gonadal maturity development of male and female occured simultaneously. Early gonadal maturity stage began in January.  Spawning occurs twice, beginning with maturity in April and spawning in May and then again maturity in July and spawning in July until October.  IKG values of male and female were relatively the same ranging from 2.56-31.92. The males matured earlier than the females at size 1.95 cm and 2.15 cm, respectively.   Keywords: female, gonad, male, clam, maturity, spawning

scholarly journals Some aspects of the reproductive biology and sex-ratio of Cirrhina reba (Hamilton) (Cyprinidae : Cypriniformes)

2012 ◽  
Vol 30 ◽  
pp. 21-24
Author(s):  
Sarmin Akther ◽  
Shirin Akther
Keyword(s):  
Sex Ratio ◽  
Reproductive Biology ◽  
Standard Length ◽  
Total Weight ◽  
Chi Square ◽  
Male And Female ◽  
Total Length ◽  
Chi Square Test ◽  
Somatic Index

Some aspects of the reproductive biology viz. sex-ratio gonadal length index (G.L.I.), gonado somatic index (G.S.I.) and sex-ratio of Cirrhina reba were studied during September 2004 to July 2005. In present study the highest values of GLI (33.76) and GSI (0.63) were in the month of July. Total length (TL) and gonadal length (GL), total weight (TW) and gonadal weight ( GW ), standard length (SL) and gonadal length ( GL ) and gonadal weight relationships were found to be positive; and the relationships were: GL = -3.873 + 0.219 TL (r = 0.992), GW = 0.01511+0.000815 TL (r = 0.979), GL = -2.6030+0.253 SL (r = 0.990), GL = 0.01997+0.000938 SL (r= 0.976), GW = 13.2952+0.6064 TW (r = 0.958), GW = 0.0772+0.00233 TW (r = 0.979). The sex- ratio of C. reba were 1:1.62 for male and female respectively. The Chi-square test showed significant differences of sex-ratio among months and totals.DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10739Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 21-24

scholarly journals REPRODUCTIVE BIOLOGY OF POKEA CLAM Batissa violacea var. celebensis, VON MARTENS 1897 AT LASOLO ESTUARY, SOUTHEAST SULAWESI

2017 ◽  
Vol 9 (1) ◽  
pp. 9
Author(s):  
. Bahtiar
Keyword(s):  
Sex Ratio ◽  
Reproductive Pattern ◽  
Maturity Stage ◽  
Fishing Gear ◽  
Chi Square ◽  
Male And Female ◽  
Gonad Maturity ◽  
Gonadal Maturity ◽  
Traditional Fishing ◽  
Number Of Males

<p><em>Pokea</em><em> clam</em><em> </em><em><span style="text-decoration: underline;">Batissa</span></em><em> <span style="text-decoration: underline;">violacea</span> var. celebensis von Martens 1897 </em><em>that inhabits the substrates of some estuaries in Southeast Sulawesi has a tendency to have differ</em><em>ent</em><em> reproductive pattern. The aim of this study was to determine the sex ratio, gonadal maturity stage (TKG), gonadal maturity index (IKG) and the size at first gonad maturity of </em><em>p</em><em>okea in Lasolo estuary, Sout</em><em>h</em><em>east Sulawesi.  Samples were randomly collected using a traditional fishing gear called tangge.  Sex ratio, TKG, IKG, and the size at first gonad maturity were </em><em>determined </em><em>using standard </em><em>methods and </em><em>formulas and then analyzed using Chi Square, </em><em>q</em><em>uantitative description and non-linear regression. The results showed that the number of males were higher than the number<span style="text-decoration: line-through;">s</span> of females, ranging from </em><em>71.85-89.84% </em><em>and</em><em> 10.16-28.15%</em><em>, respectively.  Gonadal maturity development of male and female occured simultaneously. Early gonadal maturity stage began in January.  Spawning occurs twice, beginning with maturity in April and spawning in May and then again maturity in July and spawning in July until October.  IKG values of male and female were relatively the same ranging from </em><em>2.56-31.92</em><em>. The males matured earlier than the females at size 1</em><em>.</em><em>95 cm and 2</em><em>.</em><em>15 cm, respectively.  </em></p><p><em> </em></p><p><strong><em>Keywords:</em></strong><em> </em><em>female</em><em>, </em><em>gonad, male,</em><em> </em><em>clam,</em><em> </em><em>maturity, spawning</em></p>

scholarly journals Some Aspect Biology Reproduction of the Indonesian Predatory Catfish (Wallagonia leerii Bleeker, 1851) in Sebangau River Central Kalimantan

2021 ◽  
Vol 11 (2) ◽  
pp. 276-284
Author(s):  
Nurasiah Riza ◽  
Nurlisa Alias Butet ◽  
Mohammad Mukhlis Kamal ◽  
Arif Wibowo ◽  
Okta Simon ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Chi Square ◽  
Male And Female ◽  
Gonad Maturity ◽  
Central Kalimantan ◽  
Large Size ◽  
Total Fecundity ◽  
Fish Samples ◽  
Main Target ◽  
Chi Square Test

Tapah fish (Wallagonia leerii) is one of the economically valuable and popular fish species because its large size and make it the main target for fishing in the Sebangau River. It is feared that excessive exploitation of these fish can cause a decline and threaten the sustainability of tapah fish, which up to now still depend on nature. This research aimed to describe reproductive biology of tapah fish related to sex ratio, gonad maturity, gonado-somato index and fecundity. A total of 96 fish samples were collected using fishing trap and seine net for three months at five sampling sites in Sebangau River. The results showed that the sex ratio of male and female for all samples were 1:0.9 and Chi-square test with a 95% confidence interval showed approaching to 1:1 ratio. The GSI value of male and female ranged from 0,110% – 0,522% and 0,112% – 0,651%. The spawning times were recorded from Desember to January. The total fecundity of 11 female ranged from 2976 to 155501 eggs with an average of 43334 eggs.

scholarly journals BIOLOGI REPRODUKSI TUNA MATA BESAR (Thunnus obesus) YANG TERTANGKAP DI SAMUDERA HINDIA

2017 ◽  
Vol 3 (2) ◽  
pp. 129
Author(s):  
Ria Faizah ◽  
Budi Iskandar Prisantoso
Keyword(s):  
Indian Ocean ◽  
Gonad Development ◽  
Morphological Structure ◽  
Maturity Stage ◽  
Batch Fecundity ◽  
Gonad Maturity ◽  
Thunnus Obesus ◽  
The Indian Ocean ◽  
Index Value ◽  
Somatic Index

Tujuan penelitian ini adalah untuk mendapatkan informasi mengenai aspek reproduksi ikan tuna mata besar (Thunnus obesus) di perairan Samudera Hindia. Sebanyak 42 contoh gonad dari ikan tuna mata besar yang tertangkap perairan Samudera Hindia antara bulan Maret sampai Oktober 2008 digunakan dalam penelitian ini. Pengamatan meliputi struktur morfologi gonad ikan, perkembangan gonad, diameter telur, dan fekunditas. Hasil penelitian ini menunjukan bahwa ikantuna mata besar yang tertangkap memiliki tingkat kematangan gonad I, II, dan IV. Nilai gonado somatic index rata-rata tuna mata besar semakin meningkat seiring dengan meningkatnya tingkat kematangan gonad. Musim pemijahan untuk tuna mata besar diduga terjadi pada bulan Oktober. Tuna mata besarmemiliki fekunditas antara 8.163.715-10.365.317 butir dan memiliki pola pemijahan berganda. The objective of this research is to study the reproductive biology of big eye tuna (Thunnus obesus) from Indian Ocean. A numbers of 42 gonad samples were taken from fresh individuals captured in the Indian Ocean during period of March until October 2008. The observation comprised of morphological structure of gonad, gonad development, oocytes diameter, and batch fecundity. The results showed that the gonad maturity stages of big eye tuna were ranged from immature (the gonad maturity stage of I and II) to mature (the gonad maturity stage of IV), and the gonado somatic index value increase along with increase of gonad maturity. Spawning season for big eye tuna estimated was in October, range of fecundity were 8.163.715-10.365.317 oocytes, and the spawning type waspartial spawned.

Double diapering facilitates hip maturation in newborns: a prospective randomised control study

2020 ◽  
Author(s):  
Wei C. Lee ◽  
Hsuan K. Kao ◽  
Mei C. Chen ◽  
Wen E Yang ◽  
Shih M. Chu ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Gestational Age ◽  
Birth Rate ◽  
Hip Dysplasia ◽  
Alpha Angle ◽  
First Year ◽  
Type I ◽  
Chi Square ◽  
Chi Square Test ◽  
Control Study

Abstract Background Maintaining the hips in flexion and abduction posture is a common recommendation to facilitate hip maturation in infants. Double diapering helps to maintain a baby’s hips in flexion and abduction posture, but the efficacy of double diapers in hip development has never been verified. We investigated whether double diapering results in greater improvement of the alpha angle in the first months of life. Methods This prospective randomised control study enrolled newborns with Graf type IIa hips. Babies were assigned to the double-diaper or single-diaper group. Parents were instructed on proper hip positioning, except for diapering. Change in the alpha angle from newborn to 1 month after birth, rate of improvement to bilateral Graf type I hips in 1 month, and number of ultrasound examinations and orthopaedic clinic visits in the first year were compared between the two groups. For babies with bilateral IIa hips, we used the averaged data from both hips, and for babies with unilateral IIa hips, we used the data from the IIa hips. Results Seventy newborns with 102 type IIa hips were included from January to December 2017. They were allocated to the double-diaper group (N=33) and single-diaper group (N=37). With a comparable sex ratio, gestational age, and newborn alpha angle, the double-diaper group had a greater increase of alpha angles in 1 month than the single-diaper group (+7.9° vs. +5.2°, t-test, p=0.011). Twenty-eight babies in the double-diaper group (84.8%) and 20 babies in the single-diaper group (54.1%) improved to having bilateral Graf type I hips (chi-square test, p=0.006). Subsequent clinical visits and hip ultrasounds before 1 year were significantly reduced in the double-diaper group. Conclusions Our results support double diapering for enhancing hip maturation in babies with Graf type IIa hips. The amount of improvement may not indicate double diapering as a treatment for hip dysplasia, but its effects in immature hips are noteworthy in reducing further clinical and ultrasound follow-ups.

What constitutes recovery in schizophrenia? Client and caregiver perspectives from South India

2019 ◽  
Vol 66 (2) ◽  
pp. 118-123 ◽  
Author(s):  
Subhashini Gopal ◽  
Greeshma Mohan ◽  
Sujit John ◽  
Vijaya Raghavan
Keyword(s):  
Mental Illness ◽  
Mental Illnesses ◽  
Chi Square ◽  
Internal Validation ◽  
Male And Female ◽  
Cultural Aspects ◽  
Chi Square Test ◽  
Study Participants ◽  
Female Clients ◽  
Back To Work

Background: Understanding the concept of recovery in severe mental illnesses such as schizophrenia from the social and cultural aspects is important as it will help in developing models of recovery and appropriate interventions. Client and caregiver perspectives on recovery play a significant role in shaping these models and interventions. Hence, the aim of this study was to understand how clients with schizophrenia and their caregivers perceive recovery and to examine the differences between male and female clients with schizophrenia. Materials and methods: A total of 100 clients with schizophrenia and 80 caregivers of clients with schizophrenia were included in the study after written informed consent. A semi-structured proforma was used to collect the sociodemographic profile and illness variables. A questionnaire was developed to assess the indicators of recovery from mental illness and was administered to study participants. Descriptive statistics including frequency and percentages were used along with the chi-square test for analysis. Results: The most common indicators of recovery for the clients with schizophrenia were absence of symptoms (88%), no relapse (70%) and going back to work (70%), while for the caregivers were absence of symptoms (100%), becoming independent (92.5%) and no relapse (91%). Indicators of recovery were similar between male and female clients with schizophrenia except for the need to stop medication as an indicator of recovery observed significantly more in females ( p = .006). Most clients used internal validation of indicators to assess their recovery (79%). Conclusion: Results indicate that clients and caregivers from India perceive recovery as being symptom free, able to go back to work and being independent. Clients with schizophrenia use internal validation to assess recovery. Gender does not play a role in the perceptions toward recovery in schizophrenia. These results will help in developing models of recovery for severe mental illness in Indian context leading to tailored interventions.

scholarly journals Distribution of Bigeye Tuna in the Indian Ocean as Seen from Tuna Longline Catches.

1991 ◽  
Vol 57 (9) ◽  
pp. 1683-1687
Author(s):  
Masahiko Mohri ◽  
Eiji Hanamoto ◽  
Shoichi Takeuchi
Keyword(s):  
Indian Ocean ◽  
Bigeye Tuna ◽  
The Indian Ocean ◽  
Tuna Longline
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