The age, growth, reproduction, and feeding of common stingray (
Dasyatis pastinaca) were studied using 256 specimens from the İskenderun Bay (eastern Mediterranean). Females made up 43% and males 57% ...of the individuals. The total length of females ranged from 20.5 to 88
cm (8–51
cm DW), and of males from 20 to 73
cm (7–34
cm DW). The total length–weight and disc width–weight relationships were
W=0.00144×TL
3.31 and
W=0.02168×DW
3.26, respectively. The age data, derived from vertebrae readings, were used to estimate the growth parameters of the von Bertalanffy equation:
L
∞=121.5
cm,
K=0.089,
t
0=−1.615. The maximum age was 10 years. The parturition time of common stingray occurred in summer (from May to September). Males matured at 43
cm TL (22
cm DW) and females at 46
cm TL (24
cm DW). The stomachs contained mainly Crustacea.
The age, growth, reproduction, and feeding of longnosed skate (Dipturus oxyrinchus) were studied using 179 specimens from the Saros Bay (North Aegean Sea) between March 2005 and December 2007. ...Composition was 49.7% females and 50.3% males. Total length of females ranged from 14.9 to 100 cm (disc width, 9.8-65 cm), and of males from 15.2 to 86.5 cm (disc width, 10-57.5 cm). Total length‐weight and disc width‐weight relationships are described by the equations W = 0.0008*TL³.³⁵ and W = 0.0043*DW³.²⁹, respectively. The age data, derived from vertebrae readings, were used to estimate the growth parameters of the von Bertalanffy equation: L∞ = 256.46 cm, K = 0.04 year⁻¹, t₀ = −1.17year. The maximum age was 9 years. Males matured at 64-65 cm (disc width, 43.5 cm) and females at 82-83 cm TL (disc width, 53 cm). The stomach contained mainly Parapenaus longirostris, IRI: 93.47%.
Summary
Weight–length relationships are presented for 63 fish species sampled with a commercial trawl vessel at depths ranging from 28 to 370 m between February 2005 and April 2006 in Saros Bay, ...Turkey. Saros Bay was closed to trawl fishery in 2000, thus, most of the demersal fish species sampled were relatively undisturbed.
Length-weight relationships are presented for ten shark species sampled with a commercial trawl vessel at depths ranging from 5 to 500 m between March 2005 and June 2008 in Saros Bay, Turkey. The ...values of the exponent b of the length-weight relationships ranged from 2.6816 to 3.6060.
This record represents the northernmost occurrence of Lessepsian migrant fish Siganus luridus in the Aegean Sea. A single specimen was caught off the coast of Assos, Edremit Bay, in November 2014 by ...trammel net at a depth of about 2–3 m on a sandy, rocky bottom mixed with Posidonia. Here, the morphometric and meristic characteristics of the specimen are identified and the dispersion of the species in the Mediterranean Sea is briefly discussed.
Summary
The age, growth, reproduction, sexual maturity and stomach content of John Dory (Zeus faber), caught in the Bay of Saros (North Aegean Sea) between September 2006 and September 2008, were ...investigated. The female‐male ratio was 1.6 : 1. The total length of females ranged from 13.8 cm to 52.8 cm, and of males from 12.2 cm to 42.9 cm. The length‐weight relationship was W = 0.0174*L2.936. Age data derived from vertebral centra readings were used to estimate the growth parameters of the von Bertalanffy equation. Growth parameters for females were L∞ = 58.50 cm K = 0.11 year−1, t0 = −0.99 year and for males L∞ = 45.01 cm, K = 0.13 year−1, t0 = −1.17 year. Maximum age was 18 years for females and 17 years for males. Length at first maturity for both females and males was 25.4 cm. Monthly values of the gonadosomatic index indicated that spawning occurred mainly in two peaks: one between January and June, and the other from August to September. Stomach content analysis showed the most‐preferred prey to be Pisces (IRI% 97.3).
Data on coronavirus disease 2019 (COVID-19) clinical characteristics and severity from resource-limited settings are limited. This study examined clinical characteristics and factors associated with ...COVID-19 mortality and hospitalisation in rural settings of Indonesia, from 1 January to 31 July, 2021.
This retrospective cohort included individuals diagnosed with COVID-19 based on polymerase chain reaction or rapid antigen diagnostic test, from five rural provinces in Indonesia. We extracted demographic and clinical data, including hospitalisation and mortality from a new piloted COVID-19 information system named Sistem Informasi Surveilans Epidemiologi (SISUGI). We used mixed-effect logistic regression to examine factors associated with COVID-19-related mortality and hospitalisation.
Of 6,583 confirmed cases, 205 (3.1%) died and 1,727 (26.2%) were hospitalised. The median age was 37 years (Interquartile range 26-51), with 825 (12.6%) under 20 years, and 3,371 (51.2%) females. Most cases were symptomatic (4,533; 68.9%); 319 (4.9%) had a clinical diagnosis of pneumonia and 945 (14.3%) presented with at least one pre-existing comorbidity. Age-specific mortality rates were 0.9% (2/215) for 0-4 years; 0% (0/112) for 5-9 years; 0% (1/498) for 10-19 years; 0.8% (11/1,385) for 20-29 years; 0.9% (12/1,382) for 30-39 years; 2.1% (23/1,095) for 40-49 years; 5.4% (57/1,064) for 50-59 years; 10.8% (62/576) for 60-69 years; 15.9% (37/232) for ≥70 years. Older age, pre-existing diabetes, chronic kidney disease, liver diseases, malignancy, and pneumonia were associated with higher risk of mortality and hospitalisation. Pre-existing hypertension, cardiac diseases, COPD, and immunocompromised condition were associated with risk of hospitalisation but not with mortality. There was no association between province-level density of healthcare workers with mortality and hospitalisation.
The risk of COVID-19-related mortality and hospitalisation was associated with higher age, pre-existing chronic comorbidities, and clinical pneumonia. The findings highlight the need for prioritising enhanced context-specific public health action to reduce mortality and hospitalisation risk among older and comorbid rural populations.
The age, growth, reproduction, and feeding of common guitarfish (
Rhinobatos rhinobatos) were studied using 225 specimens from the İskenderun Bay, (eastern Mediterranean). Females made up 43% and ...males 57% of the individuals. The total length of females ranged from 22.2 to 81
cm, and of males from 22 to 120
cm. The total length–weight relationships was
W
=
0.0036
×
TL
2.93. The age data, derived from vertabrae readings, were used to estimate the growth parameters of the von Bertalanffy equation:
L
∞
=
128.6
cm,
K
=
0.29,
t
0
=
−0.89. The maximum age was 5 years. The parturition time of common guitarfish occurred in summer (from May to September). The mean TL and mean weight of developed fetuse were 25.7
cm TL and 48.5
g, respectively. Males matured at 68
cm TL and females at 69
cm TL. The stomachs contained mainly Crustacea.
