Judul: Ragam Jenis Kutu pada Ayam Bukan Ras di Pasar Tradisional Kota Bogor
Abstrak: Domestic chickens has high economic value because it can be used as a chicken layer and broiler. Lice was one of the ectoparasites that can attack domestic chickens. This study was conducted to determine the diversity and distribution of lice on domestic chickens so that it can be controlled properly. Lices were obtained from 42 domestic chickens at several markets in the area of Bogor, such as Gunung Batu market, Anyar market, Bogor market and Warung Jambu market. Lices were collected from several regions of chicken’s body, such as head to neck, back, breast to feet, wings, and tail. Lice samples were put into the container which has already contained 70% alcohol and identified. The results showed that the prevalence of lice infestation at traditional market was 50%. Lice species discovered were Menopon gallinae (77.14%), Lipeurus caponis (20.57%), and Goniodes dissimilis (2.29%). This study was dominated by Menopon gallinae with the largest distribution in the breast to feet region (97.39%).
Keyword: Menopon gallinae., Lipeurus caponis, Goniodes dissimilis, domestic chickens, Bogor Agricultural University (IPB)

Judul: Diversity and Prevalence of Chewing Lice (Phthiraptera: Mallophaga) in a Poultry Farm in Laladon, Bogor.
Abstrak: Poultry lice are notorious ectoparasites that pose significant challenges to the health and productivity of poultry, thereby affecting their economic value. This study aimed to investigate the diversity, prevalence, and degree of infestation of chewing lice in five different bird species: domestic chicken (Gallus gallus domesticus), turkey (Meleagris gallapavo), fantail pigeon (Columba livia domestica), swan geese (Anser cygnoides), and Muscovy duck (Cairina moschata). Specimens were collected from various body regions and identified using established identification keys. The results revealed the presence of Menacanthus and Menopon genera in chickens and turkeys, exclusive presence of Lipeurus in chickens, Anaticola in Muscovy ducks and swan geese, Colpocephalum in fantail pigeons and swan geese, Columbicola and Campanulotes exclusively in fantail pigeons, and Holomenopon exclusively in swan geese. The prevalence of lice infestation was determined, with all bird species exhibiting a 100% prevalence, except for Muscovy ducks, which showed a prevalence of 40%. The study highlighted the challenges in identifying poultry lice at the species level due to the unavailability of identification keys, leading to incomplete identification results. Moreover, farmers need to be aware of the detrimental effects of chronic lice infestations on poultry health and productivity, Kutu unggas merupakan ektoparasit yang menyebabkan gangguan terhadap kesehatan dan produktivitas unggas, sehingga mempengaruhi nilai ekonomi komoditi unggas. Penelitian ini bertujuan untuk mengetahui keragaman spesies, prevalensi, dan tingkat infestasi kutu pada lima spesies burung yang berbeda, yaitu ayam ras (Gallus gallus domesticus), kalkun (Meleagris gallapavo), merpati kipas (Columba livia domestica), angsa (Anser cygnoides), dan entog (Cairina moschata). Sampel kutu diambil dari berbagai bagian tubuh unggas dan diidentifikasi menggunakan kunci identifikasi morfologi. Hasil identifikasi menunjukkan keberadaan genus Menacanthus dan Menopon pada ayam dan kalkun, dan keberadaan eksklusif Lipeurus pada ayam. Kutu Anaticola pada entog dan angsa, Colpocephalum pada merpati kipas dan angsa, Columbicola dan Campanulotes secara eksklusif pada merpati kipas, serta Holomenopon secara eksklusif pada angsa. Infestasi kutu pada semua jenis unggas menunjukkan prevalensi 100%, kecuali pada entog dengan prevalensi 40%. Ketidaktersediaan kunci identifikasi kutu unggas sampai tingkat spesies, menjadikan hasil identifikasi tidak lengkap. Hasil penelitian menunkjukkan bahwa peternak harus berwaspada tentang dampak infestasi kutu yang kronis dan merugikan
Keyword: chewing lice, poultry, prevalence, species diversity

Judul: Numerical modeling of the hydrodynamics of standing wave and scouring in front of impermeable breakwater with different steepnesses
Abstrak: The aim of this paper is to numerically study the effects of breakwater steepness on the hydrodynamics of standing wave and scouring process in front of impermeable breakwaters. A two-dimensional hydrodynamics model based on the Reynolds Averaged Navier–Stokes (RANS) equations and the Volume of Fluid (VOF) method was developed and then combined with an empirical sediment transport model. Comparisons with an analytical solution and experimental data showed the present model is very accurate in predicting the near bottom velocity and capable of simulating the scour/deposition patterns consistent with experimental data. It was found that the additional terms of bottom shear stress in the momentum equations are necessary to produce a physical scouring pattern. Different breakwater steepnesses produce different characteristics of standing wave, the steady streaming system, and scouring pattern in front of the breakwaters, which also affects the correlations between them. An additional analysis of the turbulence field parameters and the sediment transport rate was also performed. All these important information will be presented in details in this paper and can be worthwhile for designing the breakwater in coastal areas.
Keyword: The RANS–VOF model Standingwave Steadystreamingsystem Scouring pattern Breakwatersteepness